v1.5-init

Treewide: Refactoring Repository

- Drop fetch data from Dummy on repository
- Drop all JSON assets data
- Drop genre & cast data on layout that was fetched from dummy
- Drop dependencies on Injection class from JsonHelper after getting refactoring to Helper
- Include Production Companies on layout & fetch genre only from API
- Move API Key to BuildConfig on gradle properties
- Re-implement MutableLiveData for repository
- Refactoring repository for only fetch data from API
- Refactoring all JSON tree response from Dummy to only using API JSON tree response (Include changes to all activity, viewmodel and adapter)
- Reconfigure Datasource after refactoring repository tree
- Reconfigure all adapter after refactoring JSON tree response
- Re-write JSON Helper -> Helper class which are not tighten to JSON reading scenario from assets folder anymore, since now helper directly append data from repository
- Other misc changes (Including code cleanup)

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