MudSlider: Add ValueLabelStringFormat, ValueLabelCultureInfo, ValueLabelContent

[ScarletKuro]

Description

Follow up PR: #8745 (comment)

How Has This Been Tested?

New bUnit test. Extended value label example

Type of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (fix or improvement to the website or code docs)

Checklist

• The PR is submitted to the correct branch (dev).
• My code follows the code style of this project.
• I've added relevant tests.

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 90.09%. Comparing base (28bc599) to head (df1ad45).
Report is 88 commits behind head on dev.

Files	Patch %	Lines
src/MudBlazor/Components/Slider/MudSlider.razor	66.66%	0 Missing and 1 partial ⚠️
src/MudBlazor/Components/Slider/MudSlider.razor.cs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #8760      +/-   ##
==========================================
+ Coverage   89.82%   90.09%   +0.26%     
==========================================
  Files         412      419       +7     
  Lines       11878    12178     +300     
  Branches     2364     2397      +33     
==========================================
+ Hits        10670    10972     +302     
+ Misses        681      667      -14     
- Partials      527      539      +12     

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[henon]

Please for good measure also add a ValueLabelContent render fragment or soon we'll have a flurry of PRs wanting to add color, typo, etc etc

[henon]

I love the example by the way

[ScarletKuro]

Please for good measure also add a ValueLabelContent render fragment or soon we'll have a flurry of PRs wanting to add color, typo, etc etc

Added ValueLabelContent.
Let me know if I should remove the value context from the RenderFragment, but then they should use two way binding to get this information.
Also, the mud-slider-value-label applying some background and text transformation, if we want that gone for the ValueLabelContent I would need @danielchalmers help.

[henon]

No it is fine with the context. And the content can always override the styles of the containing div if they need to by applying their own style