-implement new class Agency representing an agency defined as detailed by https://gtfs.org/reference/static#agencytxt
-define getters
-implement builder pattern for immutable object construction
-modify gradle.build to allow use of annotations

-modify AgencyBuilder access modifiers from protected to private

-change variables and fields names to a java camel case formatting

-improve code legibility
-adapt annotations for relevant fields

-adjust camel case formatting
-add constructor to AgencyBuilder for required fields: agencyName, agencyUrl, agencyTimezone to forbid the the possibility to construct an Agency object without the required fields
-delete builder setters for agencyName, agencyUrl, agencyTimezone since these attributes are defined via the constructor
-delete comments
-improve code legibility

…dencies

-move "implementation 'org.jetbrains:annotations:19.0.0'" before test dependencies

- implement new class FareRule representing an agency defined as detailed by https://gtfs.org/reference/static#fare_rulestxt
- implement getters
- implement builder pattern for immutable object construction
- add dependency to build.gradle to allow annotation use

-make Agency class constructor private to enforce builder use
-finalize methods parameters to avoid probable bugs and ease future use in multi
-delete empty line
-add setters for required fields in AgencyBuilder

-add setters for required fields in FareRuleBuilder
-remove empty line from gradle.build file
-finalize methods parameters to avoid potential future bugs

…fs-validator into fare-rules-class

-add @nullable and @NotNull annotations in Agency class

-add @nullable and @NotNull annotations to fields and variables

-move Agency class to use case module
-add dependency on mockito for tests
-add dependency in build.gradle to enable usage of annotations
-implement use case ProcessParsedAgency
-create interface GtfsDataRepository
-implement said interface in usecase module
-implement new abstract class Entity for all Gtfs entities: agencies, stops, etc...
-add method addEntity to be able to add said entities to a GtfsDataRepository
-implement tests
-add new module "hasher" for future file hashing

-add addEntity method to GtfsDataRepository interface
-add build.gradle for future hasher

-delete hasher related file: this feature will be treated in another PR

-move back entity to domain layer
-remove visitor pattern: useless
-rename 'entity' subpackage in domain layer as gtfsentity for clarity
-correct dependency on mockito in build.gradle to avoid instability
-add getAgencyById method to GtfsDataRepository interface and its implementation in InMemoryGtfsDataRepository
-remove hasher related content in setting.gradle: this feature will be treated in another PR

…alidator into agency-class

-move curly bracket to a new line in build.gradle (domain layer)
-delete duplicate dependency in build.gradle (adapter layer)

# Conflicts:
#	settings.gradle

…tion

-rename method getAgencyList to getAgencyCollection
-change type of agency container to Hashmap<String, Agency> to ease future search in the Gtfs data repository
-rename test for clarity
-adapt tests to these changes
-add test for Agency to test Agency.AgencyBuilder build method behavior
-remove AgencyBuilder constructor to enable injection in ProcessParsedAgency usecase constructor
-inject builder in ProcessParsedAgency usecase constructor
-make use case execution method throw NullPointerException
-adapt and implement new tests for ProcessParsedAgency
-add licence header
-add javadoc comments
-delete useless dependency in build.gradle files

-add GtfsDataRepository interface to add GtfsEntities
-concrete implement of said interface
-add test class to GtfsDataRepository implementation
-add abstract class GtfsEntity: all entities will inherit from this class
-enable Junit5 in build.gradle for tests

-change package name gtfsentity to gtfs

-change package name gtfsentity to gtfs

# Conflicts:
#	domain/src/main/java/org/mobilitydata/gtfsvalidator/domain/entity/gtfs/Agency.java
#	domain/src/main/java/org/mobilitydata/gtfsvalidator/domain/entity/gtfs/routes/Route.java
#	domain/src/test/java/org/mobilitydata/gtfsvalidator/domain/entity/gtfs/AgencyTest.java
#	domain/src/test/java/org/mobilitydata/gtfsvalidator/domain/entity/gtfs/RouteTest.java
#	usecase/src/main/java/org/mobilitydata/gtfsvalidator/usecase/ProcessParsedRoute.java

…ethod

- make FareRule extend GtfsEntity
- remove constructor of entity builder
- make noticeCollection a private member of class FareRuleBuilder for future
- make builder build method return EntityBuildResult object
- write tests

…m/to GtfsDataRepository

- implement method addFareRule to add entity to data repo
- implement method getFareRule to retrieve entity from data repo
- write test to verify said methods behavior
- adapt GtfsDataRepository interface to said changes

- implement use case ProcessParsedFareRule to go from a parsed entity representing a row from fare_rules.txt to an internal representation using FareRule objects
- write test to verify said use case execution method testing:
  - invalid parsed entity generates notices an is not added to data repo
  - valid parsed entity does not generate notice and is added to data repo
  - duplicate parsed entity generates notice and is not added to data repo

… entities

- Add use case to config
- Execute use case ProcessParsedFareRule inside main method

# Conflicts:
#	adapter/repository/in-memory-simple/src/main/java/org/mobilitydata/gtfsvalidator/db/InMemoryGtfsDataRepository.java
#	adapter/repository/in-memory-simple/src/test/java/org/mobilitydata/gtfsvalidator/db/InMemoryGtfsDataRepositoryTest.java
#	application/cli-app/src/main/java/org/mobilitydata/gtfsvalidator/Main.java
#	config/src/main/java/org/mobilitydata/gtfsvalidator/config/DefaultConfig.java
#	usecase/src/main/java/org/mobilitydata/gtfsvalidator/usecase/port/GtfsDataRepository.java

…ions

- add comments to detail the use of annotations to suppress warnings

- use static method to retrieve key from FareRule entity
- finalize variable
- remove semi-colon from the definition of entity key
- adapt tests
- add comment for code clarity
- modify javadoc

# Conflicts:
#	adapter/repository/in-memory-simple/src/main/java/org/mobilitydata/gtfsvalidator/db/InMemoryGtfsDataRepository.java
#	adapter/repository/in-memory-simple/src/test/java/org/mobilitydata/gtfsvalidator/db/InMemoryGtfsDataRepositoryTest.java
#	application/cli-app/src/main/java/org/mobilitydata/gtfsvalidator/Main.java
#	config/src/main/java/org/mobilitydata/gtfsvalidator/config/DefaultConfig.java
#	usecase/src/main/java/org/mobilitydata/gtfsvalidator/usecase/port/GtfsDataRepository.java