GH: CI: add lvgl examples

Author: facchinm

Diff for: .github/workflows/compile-examples.yml

@@ -61,6 +61,7 @@ jobs:
               - libraries/doom
               - libraries/KernelDebug
               - libraries/Portenta_Camera/examples
+              - libraries/Portenta_lvgl/examples/Portenta_lvgl
               - libraries/Portenta_SDCARD
               - libraries/Portenta_System
               - libraries/Portenta_Video
@@ -99,6 +100,7 @@ jobs:
           fqbn: ${{ matrix.board.fqbn }}
           libraries: |
             - name: WiFiNINA
+            - name: lvgl
           platforms: |
             # Use Board Manager to install the latest release of Arduino mbed Boards to get the toolchain
             - name: "arduino:mbed"