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/ghostty/themes/tokyonight_night.yml

@@ -0,0 +1,24 @@
+# Tokyo Night theme for Ghostty
+background: "#1a1b26"
+foreground: "#c0caf5"
+cursor-color: "#c0caf5"
+selection-background: "#33467c"
+selection-foreground: "#c0caf5"
+
+palette:
+  - "#15161e"  # black
+  - "#f7768e"  # red
+  - "#9ece6a"  # green
+  - "#e0af68"  # yellow
+  - "#7aa2f7"  # blue
+  - "#bb9af7"  # magenta
+  - "#7dcfff"  # cyan
+  - "#a9b1d6"  # white
+  - "#414868"  # bright black
+  - "#f7768e"  # bright red
+  - "#9ece6a"  # bright green
+  - "#e0af68"  # bright yellow
+  - "#7aa2f7"  # bright blue
+  - "#bb9af7"  # bright magenta
+  - "#7dcfff"  # bright cyan
+  - "#c0caf5"  # bright white