CLI 2.0 (Better support for other formats; iOS, Android, Flutter, PHP .po, C/C++ .po, etc.)

[JanCizmar]

Recently, we released support for many more formats like iOS, Android, Flutter, PHP .po, C/C++ .po. To Tolgee more convenient to use with this new features, we need to enhance the CLI.

• Make everything configurable via .tolgeerc
  • so we can detect this file in GitHub/GitLab apps later
  • so the same export/import configuration can be shared by all the project users
  • Enable configuration of other relevant fields from export/import properties
  • Enable specifying files as a source to push
    • Files to push can be mapped to specific language tags in platform
    • Specific files can be ignored
    • Unused keys can be marked with specified tags
    • Unused keys can be removed (Add --remove-unused to tolgee push #18)
    • Enable specifying of desired message format
  • Enable specifying languages to pull
    • Languages can be mapped to files
    • Specific language can be ignored
    • Only keys with specified tags are included
    • Keys with specified tags are excluded
    • Only translations in specified state are included
• Option to not to delete destination folder completely
• Make tolgee login done via browser, so it's easier to create the API key
• Use single-step import, so the import is done in single request
• Option to remove keys not contained in source (pushed) file