feat: Sync complete config - Fish, Ghostty, Neovim Scratch

- Add missing Fish configs (direnv, ssh function)
- Add Tokyo Night theme for Ghostty
- Complete Neovim scratch config sync
- Rewrite install.sh for new structure
- Add comprehensive README.md

.config/nvim/.gitignore

@@ -1,7 +1,16 @@
-tags
-test.sh
-.luarc.json
-nvim
-
-spell/
+# Neovim
 lazy-lock.json
+.neoconf.json
+
+# Plugin data
+plugin/
+spell/
+
+# Treesitter compiled parsers
+parser/
+
+# Undo history
+*~
+
+# OS
+.DS_Store