chore(plugins): purge typing-era tooling

Agent-driven work shifted nvim from writing code to reading and
reviewing it. Dropped:

- supermaven-nvim: inline AI completion duplicates the agent
- nvim-spectre: project-wide find/replace is now a prose request
- tailwind-tools: authoring aid for markup not hand-written
- editing.lua: hop.nvim plus ~85 lines of commented-out plugins
  (hardtime, ufo, local-highlight)
- telescope.nvim: second picker; gd/gv/gr now use fzf-lua, which
  was already bound to lsp_references

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lua/configs/cmp.lua

@@ -3,8 +3,6 @@ local lspkind = require "lspkind"
 local nvchad_options = require "nvchad.configs.cmp"
 
 local options = {
-  -- Supermaven handles AI completion inline (ghost text, accept with <C-Enter>);
-  -- it is not a cmp source, so it is intentionally absent here.
   sources = {
     { name = "nvim_lsp" },
     { name = "luasnip" },