[Widgets] - Added advanced color settings and other Appearance configurations

[ArtemDzhereleiko]

Pull Request description

Changes overview:

1. Simple Gauges - Expanded customization options in the 'Appearance' menu with added "basic" and "advanced" settings options.
2. Simple Gauges - Added advanced color settings, including gradient and range options.
3. Battery Level Widget - Enabled gradient and range color settings for battery level widget.
4. Timeseries Line Chart Widget - Updated threshold data key configuration for Timeseries Line Chart widget, enhancing its functionality and usability.

Details see below.

Simple digital gauge:
Basic:

Advanced:

Color settings:
Range advanced

Gradient:

Gradient advanced:

Additional:

• For battery level widget enabled: Gradient, Gradient advanced and Range advanced color settings.
• Update Thresholds data key configuration for Timeseries Line Chart widget.
  

General checklist

• You have reviewed the guidelines document.
• Labels that classify your pull request have been added.
• The milestone is specified and corresponds to fix version.
• Description references specific issue.
• Description contains human-readable scope of changes.
• Description contains brief notes about what needs to be added to the documentation.
• No merge conflicts, commented blocks of code, code formatting issues.
• Changes are backward compatible or upgrade script is provided.
• Similar PR is opened for PE version to simplify merge. Crosslinks between PRs added. Required for internal contributors only.

Front-End feature checklist

• Screenshots with affected component(s) are added. The best option is to provide 2 screens: before and after changes;
• If you change the widget or other API, ensure it is backward-compatible or upgrade script is present.
• Ensure new API is documented here