Add various missing file names & extensions

[petamas]

This PR adds support for a couple different formats:

• Fixed file names with known internal format:
  • Brewfile (used by Homebrew) is interpreted as Ruby
  • Fastfile (used by Fastlane) is interpreted as Ruby
  • uv.lock (used by Astral's uv) is a TOML file
• Alternative extensions for preexisting file formats:
  • .cmd to batch (previously only .bat was recognized)
  • .diff to diff (previously only .patch was recognized)
• New formats that are subclasses of a general-use format:
  • .xaml (XML files used by Microsoft's WPF and UWP)
  • .entitlements (property list files used by Apple OSs)
• Completely new formats:
  • .hlsl for HLSL (High-Level Shader Language) source files
  • .hlsli for HLSL (High-Level Shader Language) header files

There's no real connection between these formats apart from all being present in a repository I'm introducing pre-commit to. I'll soon open a couple other PRs with more formats that are related to each other. (I'll open separate PRs for other groups of formats that are related to each other.)

I'm happy to split this up further if you want me to.

[asottile]

yeah this is unreviewable. things need to be unambiguous and one per pr

[petamas]

@asottile : which of these would you consider ambiguous? I'm happy to open separate PRs per format, I just want to verify if you find any extensions ambigious.