Issue #582: Add simplified badge colors

[demarsdouglas]

Hello! Longtime fan of this project and excited to contribute! :)

This PR looks to address this issue: #582

I've added support for named colors in scc badges. This lets end users use human readable color names instead of only hex values, and preserves backwards compatibility.

WHAT CHANGED:

• Added a namedColors map that covers the following:
  • shields.io colors (brightgreen, green, yellowgreen, etc..)
  • semantic aliases (success, important, critical, etc..)
  • standard CSS color names (100+ common web colors like white, black, navy, teal, etc..)
• Added a resolveColor() helper
  • Accepts either a named color or a hex value
  • Returns a normalized hex value
  • Is case-insensitive
  • Returns an empty string for invalid inputs
• Updated parseBadgeSettings() to use resolveColor() instead of the old hex-only regex validation
• Added tests :)

With the above, users can now write:

?badge-bg-color=blue&title-bg-color=brightgreen&font-color=white

instead of

?badge-bg-color=007ec6&title-bg-color=44cc11&font-color=fff

Hex codes work exactly as before so this is fully backwards compatible.

Let me know if you have any feedback and I can implement it!

[boyter]

Neat! That looks pretty comprehensive. Going to merge in and ping when its deployed.

[boyter]

Done. Merged and deployed.

Thank you so much @demarsdouglas for this! It was one of those things I have been meaning to add in forever.