lsp: add vstls LSP with vue support

[blackxored]

Adds vtsls as a language server for TypeScript, with Vue support.

Vue support these days seems to require both vtsls as a language server and the vue_ls server, the setup is not a one-liner, that's why I thought to add it as a single switch with this module.

lspconfig.<server>.setup is not working for me here, despite updating nvim-lspconfig (part of this PR regardless), perhaps related to how or when nvf enables servers, or due to one (vue_ls) depending on another.
Side effect, it seems that these configs are always on with this method (check :LspInfo on blank) whereas other LSPs are not, it doesn't bother me much since they don't activate on everything.

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: blackxored

HEAD at: lsp/vtsls

Reruns: 1168

[horriblename]

hi, we're moving away from lspconfig in v0.8 #1018, as such, we are freezing changes to the language module until the work there is done. If you want to, you can use the new approach in v0.8 and make a PR for after we get that merged