Add password digit highlighting and settings toggle

[metergames]

This pull request introduces a new feature that allows users to highlight digits in revealed passwords with a different color, making it easier to distinguish similar-looking characters (like 0 and O). The feature can be enabled or disabled via a new setting in the app's settings screen. The implementation includes changes to the password display logic, user preferences, and the user interface.

Closes #191

Password Display Enhancements

• Added logic in CopyTextItem to highlight digits in revealed passwords using a custom color (password_digit) when the new setting is enabled. This is handled by the new refreshDisplayedText method, which applies a ForegroundColorSpan to digits. [1] [2] [3] [4] [5]

Settings and Preferences

• Introduced a new setting value COLOR_PASSWORD_DIGITS in SettingValues to control whether password digits are highlighted.
• Updated SettingsFragment to include a new checkbox (settings_color_password_digits_switch) for enabling/disabling the digit-highlighting feature, and to persist the user's preference. [1] [2] [3] [4]
• Updated the settings layout (fragment_settings.xml) to add the checkbox and its descriptive label.

User Interface and Localization

• Added new string resources for the setting's label and description, and defined the color used for highlighting digits. [1] [2]

[binsky08]

wtf, I just did merge it locally into master, pushed it but github failed to track it ?!? come on

[binsky08]

ah oh, you merged master after i pulled it, haven't seen it, sry. technically it's merged, so i'll close it.

Thanks for the implementation @metergames, nice feature!

I'll try to get it released the next days. I'll wait for some translations to come in for the new highlight string.