fix(command-mode): fix shift key and capitalization behaviour

[smalik2811]

Correct capitalization behavior, fix shift key icon, and handle German plural noun capitalization.

Closes #287

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 pull request addresses issue #287 by resolving several issues with the command bar:

• Corrected text capitalization behavior: Ensured correct capitalization of text entered in the command bar, including proper handling of cases like German plural nouns.
• Fixed shift key icon behavior: Corrected an issue where the shift key icon and label of the keys did not accurately reflect the shift key state during command mode.

Related issue

• Text entry is being capitalized for Scribe command bar #287

[github-actions]

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Maintainer checklist

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

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[github-actions]

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[andrewtavis]

Thanks for this, @smalik2811! :) We'll get to the review soon 😊

[andrewtavis]

Wonderful, thanks for this, @smalik2811!

[andrewtavis]

One thing to note here is that we should switch to the letter keys when the user selects a command, but we can work on this in another issue :)

[andrewtavis]

Is looking good to me, @smalik2811! Thanks for the great first contribution :) Let's look into the tests, and I'll make the issue for switch the keyboard to letters for commands now, so maybe you'd have interest in that as well 😊