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/configs/conform.lua

@@ -2,10 +2,10 @@ local options = {
   formatters_by_ft = {
     lua = { "stylua" },
     rust = { "rustfmt", require_cwd = true },
-    javascript = { "biome-check", "biome", "biome-organize-imports" },
-    typescript = { "biome-check", "biome", "biome-organize-imports" },
-    json = { "biome-check", "biome" },
-    yaml = { "biome-check" },
+    -- biome-check runs format + organize-imports + safe lint fixes in one pass
+    javascript = { "biome-check" },
+    typescript = { "biome-check" },
+    json = { "biome-check" },
     solidity = { "forge_fmt" },
     nix = { "nixfmt" },
     toml = { "taplo" },