feat: ctags_lsp

[delphinus]

Adds a config for ctags_lsp

This adds a server config for ctags-lsp,
a small LSP server wrapping universal-ctags. It provides code completion,
go-to-definition, and document/workspace symbols.

Use case

ctags-lsp is generic — it isn't tied to a single language. Useful as:

• a fallback symbol provider for languages without a dedicated language server,
• a complement to a primary LSP when working in a tags-indexed codebase,
• a low-overhead option in environments where heavier LSPs are impractical.

Criteria

• GitHub stars: https://github.com/netmute/ctags-lsp has 138 stars as of writing — exceeds the 100-star threshold.
• Active user base for the targeted "language": the underlying tool, universal-ctags (~7k stars), is widely used across virtually every programming language. Many editors, IDEs, and CLI workflows already produce or consume ctags. ctags-lsp brings that established workflow into the LSP ecosystem.
• Maintenance: the upstream repo has 19 releases, latest v0.11.0 (January 2026).

Notes

No default filetypes — left for users to configure, matching the
convention used by other generic servers (e.g. typos_lsp).