Possibility to merge source changes of upload_sources action with Crowdin sources.

[matuslittva]

Is your feature request related to a problem? Please describe. When I run the Crowdin action with upload_sources: true with new strings added into my source file. But in the meantime someone modified some of the source strings in Crowdin. My Crowdin action will replace these changes with the original texts.

Describe the solution you'd like I would love to have possibility to merge texts (not just replace strings file on crowdin with my file from Github action) or at least create conflicts in automated PR so I can solve it manually by myself.

Describe alternatives you've considered I wanted to use some of upload_sources_args, but haven't really found clear list of all available arguments in CLI documentation.

[bertho-zero]

Same problem here, it would need an option upload_sources_modified_only and upload_translations_modified_only or something like that.