fix(config): cleanup bugs, redundancy, and add agent-friendly auto-reload

- remove broken mini.files mappings (plugin disabled; yazi is used now)
- dedupe tint.nvim spec (drop plugins/theme.lua, keep ui.lua)
- drop dead copilot cmp source + moot Supermaven symbol (Supermaven stays inline)
- remove yaml from biome formatters (biome has no yaml support)
- collapse 3x biome chain to a single biome-check pass
- remove duplicate insert-mode jk mapping
- lazy-load tailwind-tools by filetype
- diagnostics: update_in_insert = false
- untrack .nvimlog, add .gitignore
- auto-reload files changed on disk (autoread + checktime autocmds)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lua/plugins/lsp.lua

@@ -59,6 +59,7 @@ return {
   {
     "luckasRanarison/tailwind-tools.nvim",
     name = "tailwind-tools",
+    ft = { "html", "css", "scss", "javascriptreact", "typescriptreact", "vue", "svelte", "astro" },
     build = ":UpdateRemotePlugins",
     dependencies = {
       "nvim-treesitter/nvim-treesitter",