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_local/bin/executable_c2p

@@ -0,0 +1,5 @@
+#!/bin/sh
+# Code2Prompt with fuzzy-search template.
+tpl=$(fd --type f --extension hbs . "$HOME/.config/code2prompt" | fzf) || exit 0
+[ -n "$tpl" ] || exit 0
+exec code2prompt --template "$tpl"