Migrate more options to chezmoi

- Add boolPrompt for _hasGui_ to allow to run some scripts confitionally
- Add script to setup catppuccin GTK theme

chezmoi/.chezmoiscripts/run_once_setup_gtk_theme.sh.tmpl

@@ -0,0 +1,25 @@
+{{- if eq .hasGui true -}}
+#!/usr/bin/env bash
+
+#  ╭──────────────────────────────────────────────────────────╮
+#  │                Setup Catppuccin GTK theme                │
+#  ╰──────────────────────────────────────────────────────────╯
+
+set -e
+
+tmp_dir="$(mktemp -d)"
+
+cd "$tmp_dir"
+
+git clone --recurse-submodules git@github.com:catppuccin/gtk.git
+cd gtk
+python -m venv venv
+
+source venv/bin/activate
+
+pip install -r requirements.txt
+
+python install.py macchiato --link -a teal -d ~/.themes --tweaks normal
+
+rm -rf "$tmp_dir"
+{{ end }}