Add the option to change the UI Theme at runtime

[Marterich]

Type of Change

• New feature
• UI/UX improvement

Description

This PR Adds a new Button to Switch from Light to Dark Mode at runtime.
Winutil will persist the setting across reboots and start with the latest theme used.

Impact

As this PR completely overhauls how the Properties for the UI Elements are stored (now as Resource Objects), it touches almost EVERY UI Element. Still, IMHO this creates a good foundation to unify how we handle properties like colors in the future in a scalable, maintainable way.

Testing

Tested on Win11
Please test thoroughly as this revamps many of the UI internals and might have missed something.

Issue related to PR

• Resolves Button theme #2696

Additional Information

I simplified the themes (completely removed the pulsing) and decided to keep only a Light and a Dark Theme. This can be easily extended in the future, for example, to allow more than 2 Themes or even Custom Themes that the user can modify.

• Check if it's possible to reimplement the pretty Togglebuttonstyles
• Rename _default to "Lite" and recreate a section and logic in the json and ps1 to hold common settings
• Check what logic in Set-WinUtilUITheme is needed (e.g. loading themes to a PSObject)
• Check it the other options (font sizes etc.) can also be loaded as a Resource
• Make the Theme change persistent across app reboots
• Unify / optimize coding style and cleanup tasks
• Document Changes

[SHR1SHAK]

Hey Marterich
Just tested this and the refactor is much easy to customize now. The redundant values were removed that a plus point but seems that the changes made in #2722 were not implemented.
Also instead of light and dark theme switch there should be option to switch between themes

[Marterich]

Hey Marterich Just tested this and the refactor is much easy to customize now. The redundant values were removed that a plus point but seems that the changes made in #2722 were not implemented. Also instead of light and dark theme switch there should be option to switch between themes

I've reimplemented the Theme changes you referenced.
Regarding a Dropdown menu or something to manually select the Theme, I would mark this up as "future development potential for a later PR"