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_extract_agents

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Copy all AGENTS.md files to a target directory while preserving structure.
+out_dir=$1
+
+if [ -z "$out_dir" ]; then
+    echo "Error: Output directory required." >&2
+    echo "Usage: extract_agents <absolute_or_relative_output_path>" >&2
+    exit 1
+fi
+
+mkdir -p "$out_dir"
+
+# Find and copy preserving relative paths
+fd -t f -g "AGENTS.md" -x cp --parents "{}" "$out_dir"
+
+echo "Extraction complete. Check $out_dir."