WiFi Detection, vainfo & Java JRE

- Implemented multi-layered WiFi detection logic in `utils.sh`. Added PCI class text grep, exact `lspci -d ::0280` matching for wireless devices, Broadcom vendor ID fallback (`14e4`), and USB discovery via `lsusb`. Improved `sysinfo.sh` fallback message to guide users toward the Firmware option.
- Added `_pause()` execution after `vainfo` outputs in `gpu/_helpers.sh` (`offer_generic_tools`) and `gpu/amd_intel.sh` (`offer_amd_tools`, `offer_intel_tools`). Ensures users can review hardware info before proceeding with tool installation.
- Refactored Java selection in `extras/java.sh`. Switched from single-option `--menu` to multi-select `--checklist`, enabling simultaneous Temurin JRE installations with all versions enabled by default and iterative installation logic.

modules/sysinfo.sh

@@ -87,7 +87,7 @@ _show_sysinfo() {
         if ! $found_active_wifi && [ -n "$WIFI_DESC" ]; then
             has_network=true
             msg+="WiFi:     ${WIFI_DESC}\n"
-            msg+="          (no driver — install firmware)\n"
+            msg+="          (no driver — use Firmware option in main menu)\n"
         fi
 
         if ! $has_network; then