UX Refactor: Pauses, Status & WiFi

- Implemented global `_pause()` logic across all modules (`utils`, `gaming`, `firmware`, etc.), replacing hardcoded `read -p` calls to standardize exit pauses.
- Unified MangoHud installation into a single command (`apt install -y mangohud:i386`) for gaming and legacy branches.
- Refactored `_inst()` to return `*` instead of `(installed)`, moving the function globally to `utils.sh` and removing duplicates from helpers.
- Enhanced Broadcom WiFi detection with expanded grep patterns ('network controller', 'wireless', etc.) and ID fallback (`14e4`).
- Updated `_run_cmd` to integrate the new pause logic for consistent workflow interruptions during script execution.

modules/gaming.sh

@@ -151,6 +151,7 @@ install_gaming() {
 
     if [ -z "$choices" ]; then
         echo "No gaming packages selected."
+        _pause
         return
     fi
 
@@ -192,4 +193,5 @@ install_gaming() {
     done
 
     echo -e "${GREEN}Gaming setup complete.${NC}"
+    _pause
 }