Initial import: chezmoi source for Omarchy (Hyprland)

Imported from prdlk/dotfiles master (efdd827), which supersedes the omarchy
branch (3031416). Drops the Umbriel, Noctalia, niri, CachyOS, macOS, and Blume
docs-site layers; docs/ is plain Markdown.

dot_local/bin/executable_launch_omp_livediff_overlay

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Overlay omp on the current kitty window with a livediff split beside it.
+#
+# kitty appends -PID to config-file listen_on sockets, so a hardcoded
+# --to unix:@kitty-local never matches. kitty @ resolves the real
+# address from $KITTY_LISTEN_ON on its own.
+if [ -z "${KITTY_LISTEN_ON:-}" ]; then
+    echo "launch_omp_livediff_overlay: no kitty remote-control socket (KITTY_LISTEN_ON unset)" >&2
+    exit 1
+fi
+
+# omp overlays the current window; capture its window id
+wid=$(kitty @ launch --type=overlay-main --cwd=current omp) || exit
+
+# livediff side by side in the same tab; keep focus on omp
+exec kitty @ launch --match "id:$wid" --location=vsplit --keep-focus --cwd=current livediff