refactor(launcher): use launch_profiles only\n\nRemove the temporary launch_scripts compatibility alias and keep the launcher

configuration surface focused on launch_profiles everywhere in the Svelte app and
docs.

src/lib/electron/electron_relay.ts

@@ -81,7 +81,6 @@ export async function launch_from_cache({
      *   - Shell command: prefix with "shell:" → e.g. "shell:open \"{{path}}\""
      *
      * Configure via event_device.data_json.launch_profiles or $events_loc.launcher.launch_profiles.
-     * Legacy launch_scripts keys are still accepted by the Svelte resolver for older records.
      * If null, Electron falls through to its built-in hardcoded defaults.
      */
     script_template?: string | null;