💄 SSW Red theme

[jernejk]

Add custom SSW theme.

Based on early 2024 attempts and a refresh look at this problem late 2024, this might not be a trivial tasks for AntBlazor. It might be better to complete #96 first.

Details

Based on a quick search, I found custom themes for MudBlazor that look like what we need (and what ChatGPT suggests but doesn't work with AntBlazor).
https://www.mudblazor.com/customization/overview#custom-themes

AntBlazor seems to have ways to have custom themes, but the process is far more involved and might require us to add additional infrastructure to compile custom LESS files. (or now CSS + JS, AntDesign might have changed that in recent versions)

• How do I modify the default theme of Ant Blazor? ant-design-blazor/ant-design-blazor#2641
• How can I change the colors using the Blazor Boilerplate template? ant-design-blazor/ant-design-blazor#979

Acceptance Criteria

1. Add SSW red light and dark mode
2. Default theme should be SSW red light/dark mode depending on the system preference (supported in MudBlazor, _mudThemeProvider.GetSystemPreference)