feat(android): native text process actions (WIP)

[EchoEllet]

Description

Add support for querying the native processing action button items on Android.

Thanks to @theachoem for the amazing issue report; however, this PR will not be merged soon. Pressing the back button doesn't hide the context menu/toolbar, this is an existing issue (https://github.com/singerdmx/flutter-quill/issues/2527), and it should have priority over this new feature. I will add the tests as soon as we're in the final stage of this PR.

Related Issues

• Fix #2515

Type of Change

• [x] ✨ Feature: New functionality without breaking existing features.
• [ ] 🛠️ Bug fix: Resolves an issue without altering current behavior.
• [ ] 🧹 Refactor: Code reorganization, no behavior change.
• [ ] ❌ Breaking: Alters existing functionality and requires updates.
• [ ] 🧪 Tests: New or modified tests
• [x] 📝 Documentation: Updates or additions to documentation.
• [ ] 🗑️ Chore: Routine tasks, or maintenance.
• [ ] ✅ Build configuration change: Build/configuration changes.

[EchoEllet]

If this is considered a high-level feature, then it probably shouldn't be in QuillRawEditor instead.

[CatHood0]

I'm gonna check this out in a while.

[theachoem]

Yeah, it should be in the raw editor state similar to how flutter text field do it.