feat: Completed emmet-ls integrations

[valyntyler]

Sanity Checking

• I have updated the changelog as per my changes
• I have tested, and self-reviewed my code
• My changes fit guidelines found in hacking nvf
• Style and consistency
  • I ran Alejandra to format my code (nix fmt)
  • My code conforms to the editorconfig configuration of the project
  • My changes are consistent with the rest of the codebase
• If new changes are particularly complex:
  • My code includes comments in particularly complex areas
  • I have added a section in the manual
  • (For breaking changes) I have included a migration guide
• Package(s) built:
  • .#nix (default package)
  • .#maximal
  • .#docs-html (manual, must build)
  • .#docs-linkcheck (optional, please build if adding links)
• Tested on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin

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Debug Information

Triggered by: valyntyler

HEAD at: emmet-ls

Reruns: 1595

[NotAShelf]

Emmet-ls is currently present in the master branch. Two things I want to note:

1. Should this be a default server? I don't think emmet is that common of a language, so it should be opt-in UNLESS it enhances the basic HTML experience. Duplicating LSPs is also not too desirable. If emmet is this divergent, it might be preferrable that we make it its own language module.

2. Are those root markers accurate?

Lastly, the changelog entries will have to go into 0.9 instead.

Sorry for the very delayed review; I've managed to miss this PR somehow. With minor tweaks I should be able to merge this.

[valyntyler]

Hey! Thanks for the update!
I can definitely see this being it's own module, and I think that is a quite elegant solution. On the other hand, emmet-ls doesn't to my knowledge interfere with any of the default servers, which is why I suggested it as a default (for people who are used to doing web dev in vscode). Let me know which one you prefer and I'll update the PR accordingly.