[Docs] Add source-gif README on Tenor Deprecation

[ParaskP7]

(Partially) Closes: AINFRA-1781

• Related: WCAndroid##15243

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Description

Add documentation warning users about the Tenor API sunset on June 30, 2026. Google announced that the Tenor API will be deprecated, with new API key sign-ups blocked starting January 13, 2026, and full termination on June 30, 2026.

This PR adds:

• mediapicker/source-gif/README.md with:
  • Prominent deprecation warning
  • Key dates and timeline
  • Migration recommendations (GIPHY)
  • Migration steps including Tenor references in parent module
  • Module structure overview
  • Screenshot of the official deprecation notice
• mediapicker/README.md with:
  • Module overview
  • Deprecation warning linking to source-gif README
  • List of Tenor references in the parent module
  • Module structure overview

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Testing Steps

1. Review the rendered markdown files on GitHub
   • mediapicker/README.md
   • source-gif/README.md
2. Verify the deprecation warning renders correctly with the [!WARNING] admonition
3. Verify the image displays properly
4. Confirm all links work correctly

[Copilot]

Pull request overview

Adds module-level documentation to warn about the Tenor API deprecation and guide migrations away from the source-gif integration.

Changes:

• Added mediapicker/source-gif/README.md describing Tenor deprecation timeline, migration steps, module structure, and an included screenshot.
• Added mediapicker/README.md summarizing the module and calling out Tenor-related references in the parent module.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
mediapicker/source-gif/README.md	Adds Tenor deprecation warning, timeline, migration guidance, and module overview for the GIF source.
mediapicker/README.md	Adds top-level mediapicker module overview and links to the Tenor deprecation details in source-gif.

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[wzieba]

👍 but I think we should also remove publishing logic: https://github.com/wordpress-mobile/WordPress-MediaPicker-Android/blob/trunk/.buildkite/publish-mediapicker-source-gif.sh and remove source-gif from settings.gradle

[ParaskP7]

...but I think we should also remove publishing logic: https://github.com/wordpress-mobile/WordPress-MediaPicker-Android/blob/trunk/.buildkite/publish-mediapicker-source-gif.sh

Hmmm, you think @wzieba ? 🤔 (not a bad idea indeed)

• On the one hand I like this idea, because when we'll publish a new version of this library we'll make sure that we won't be able to use source-gif.
• On the other hand I am not sure if that's worth it, because when the migration to another provider happens (but also if) we'll need to remember and bring that publishing logic back.

What do you think of me just commenting-out this piece of logic here, with an adequate comment on why this was done, and let it be for now? 🤔

  - label: "Publish :mediapicker:source-gif"
    depends_on:
      - "publish-mediapicker-domain"
    plugins: [$CI_TOOLKIT]
    command: |
      .buildkite/publish-mediapicker-source-gif.sh

...and remove source-gif from settings.gradle

Hmmm, I see, but also removing this logic is not that simple because the sampleapp is using source-gif, which will require a number of changes, for which:

1. I am not sure if it is worth it.
2. I am not sure if that's the correct way forward with this sample app. Maybe it is better to have it there and showcase how Tenor is no longer working (until or past the deadline), then keep this whole logic for testing purposes during the migration.

Wdyt? 🤔

[wzieba]

Sure, we can leave the module in the configuration 👍

[ParaskP7]

What do you think of me just commenting-out this piece of logic here, with an adequate comment on why this was done, and let it be for now? 🤔

@wzieba thx, but wdyt about that though? 😊

[wzieba]

Sounds good 👍 !

[ParaskP7]

Sounds good 👍 !

FYI: This is now done: 7a8a355