Fix Caps Lock Icon Theming and Improve Shift Key Behavior

[bhanu-dev82]

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

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Description

This PR addresses theming issues with the keyboard icons and improves the visual feedback for shift key states. The main improvements include:

1. Fixed the caps lock icon to properly respect the system/user theme in both light and dark modes
2. Applied consistent color filtering to all special keys including caps lock
3. Improved the visual consistency between caps lock on/off states by aligning their dimensions
4. Enhanced the shift key behavior to provide clear visual feedback when locked

These changes improve the overall user experience by providing consistent visual feedback across the keyboard interface and ensuring proper theme compliance for all UI elements.

Related issue

• Fixes Shift key on keyboard should be a slightly different color when activated #322

Technical details

• Applied color filtering to caps lock icons in the onBufferDraw() method
• Updated drawable XML files to use theme-aware color resources
• Aligned dimensions between caps lock on/off states for visual consistency
• Implemented proper visual feedback for shift locked state using the key pressed color

Testing

Tested on multiple devices in both light and dark modes to ensure proper theming across all conditions.

[github-actions]

Thank you for the pull request! ❤️

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[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 :)

• The linting and formatting workflows within the PR checks do not indicate new errors in the files changed

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

[andrewtavis]

Really well done, @bhanu-dev82 :) Really is great to have you in the community! 🚀