Initial import: chezmoi source for CachyOS + Umbriel + Noctalia

Imported from prdlk/dotfiles master (efdd827). Drops the niri, Hyprland/Omarchy,
macOS, and Blume docs-site layers; docs/ is plain Markdown.

dot_leetcode/version-cache.json

@@ -0,0 +1,5 @@
+{
+  "lastCheck": 1791914670771,
+  "latestVersion": "3.5.2",
+  "hasBreakingChanges": false
+}