Migrate from Triple-t to Fastlane

[TrianguloY]

Describe a related problem (optional)

No response

Describe your suggested feature

Review and migrate from using Triple-t to Fastlane for store assets (images, descriptions, etc).

Thinks to consider:

• The change must migrate from one to the other without losing data (unless something present in triple-t is not present in fastlane, in that case that can be discarded but should be noted for review).
• If fastlane requires new data and you don't know what to write, use a placeholder and/or ask for it.
• Currently f-droid extracts the metadata from the existing triple-t files. After the change f-droid must be updated (or maybe that's automatic and nothing is needed)
• There is a custom action that checks that translation files are present and valid. That action should be migrated or replaced with a fastlane one.
• If necessary, the migration can be made in two steps (first create the fastlane files, after that delete the triple-t ones). However a single migration should be preferred.

Describe alternatives you've considered for your suggested feature

No response

Other details

For more details see here: https://gitlab.com/IzzyOnDroid/repo/-/issues/719#note_2370366548

Acknowledgements

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