Fix: Improve Keyboard Theme Consistency

[Roniscend]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have tested my code with the ./gradlew lintKotlin detekt test command as directed in the testing section of the contributing guide

---

Description

Fixed keyboard theme inconsistencies by improving the keyboard UI. The keyboard now follows the system default theme by default. Additionally, when users attempt to switch to a theme that differs from the system theme, a confirmation dialog is displayed to ensure they want to override the system setting.
For example

Fixes : #628

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.

[github-actions]

Thank you for the pull request! 💙🩵

The Scribe-Android team will do our best to address your contribution as soon as we can. The following are some important points:

• Those interested in developing their skills and expanding their role in the community should read the mentorship and growth section of the contribution guide
• If you're not already a member of our public Matrix community, please consider joining!
  • We'd suggest that you use the Element client as well as Element X for a mobile app
  • Join the General and Android rooms once you're in
• Also consider attending our bi-weekly Saturday developer syncs!
  • Details are shared in the General room on Matrix each Wednesday before the sync
  • It would be great to meet you 😊

Note

Scribe uses Conventional Comments in reviews to make sure that communication is as clear as possible.

[github-actions]

Maintainer Checklist

The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

• Tests for changes have been written and the unit test, linting and formatting workflows within the PR checks do not indicate new errors in the files changed

  • Tests may need to be reran as they're at times not deterministic

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

[Roniscend]

@andrewtavis with this pr, the Scribe keyboard follows the system theme and automatically updates when it changes, while displaying a warning if the user chooses a theme that goes against the system theme. Could you please review it and let me know if you have any suggestions