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/firmware.sh

@@ -268,6 +268,7 @@ _handle_wireless() {
                 _run_cmd "Broadcom" "sudo DEBIAN_FRONTEND=noninteractive apt install -y linux-headers-$(uname -r) broadcom-sta-dkms" \
                     "Installing Broadcom driver..."
                 echo "Broadcom proprietary driver installed. A reboot may be required."
+                _pause
                 installed_any=true
             fi
         fi
@@ -281,6 +282,7 @@ _handle_wireless() {
 
     if ! $installed_any; then
         echo "No special WiFi firmware needed -- base firmware-linux-nonfree covers this system."
+        _pause
     fi
 }
 
@@ -307,6 +309,7 @@ main menu to install proprietary firmwares." 10 65
     # 3. Confirm
     if ! _confirm "Firmware" "Apply the network & firmware plan?"; then
         echo "Firmware installation skipped."
+        _pause
         return
     fi
 
@@ -328,6 +331,7 @@ main menu to install proprietary firmwares." 10 65
             fi
         else
             echo "$fw_pkg already installed."
+            _pause
         fi
     else
         local msg="firmware-linux-nonfree provides hardware drivers for:\n"
@@ -366,4 +370,5 @@ main menu to install proprietary firmwares." 10 65
 
     # 8. Summary
     echo -e "${GREEN}Network & firmware setup complete.${NC}"
+    _pause
 }