Implement posix app loading (#643)

- Added POSIX desktop support for SDK builds, application packaging, and integration testing.
- Added POSIX filesystem partitions and improved application path handling.
- Added simulator support for loading and running applications dynamically.
- Improved simulator task stack handling and display startup reliability.
- Improved simulator display scaling, resizing, high-DPI support, and pointer accuracy.
- Fixed LVGL timers and input polling on POSIX. (fixes simulator with Linux on some Intel graphics platforms)
- Standardized data paths across platforms.
- Logging now works via separate task: this allows apps to write to log without it affecting their stdout (for apps that output text as relevant date for other apps, like the File Selection app)
- Fixes for app stdio

.github/workflows/build.yml

@@ -11,7 +11,7 @@ on:
 permissions: read-all
 
 jobs:
-  BuildSdk:
+  BuildSdkEsp32:
     strategy:
       matrix:
         board: [
@@ -30,9 +30,17 @@ jobs:
         with:
           board_id: ${{ matrix.board.id }}
           arch: ${{ matrix.board.arch }}
+  BuildSdkPosix:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+      - name: "Build SDK"
+        uses: ./.github/actions/build-sdk-posix
   GenerateDeviceMatrix:
     runs-on: ubuntu-latest
-    needs: [ BuildSdk ]
+    needs: [ BuildSdkEsp32 ]
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
@@ -57,7 +65,7 @@ jobs:
           arch: ${{ matrix.board.arch }}
   BundleArtifacts:
     runs-on: ubuntu-latest
-    needs: [ BuildFirmware ]
+    needs: [ BuildFirmware, BuildSdkPosix ]
     if: |
       (github.event_name == 'push' && github.ref == 'refs/heads/main') ||
       (github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v'))