Add basic test harness using munit

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: "FAP: Build and lint"
+name: "FAP: Build, test, and lint"
 on: [push, pull_request]
 jobs:
   ufbt-build-action:
@@ -9,20 +9,23 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: 'true'
+      - name: Setup ufbt
+        uses: flipperdevices/flipperzero-ufbt-action@v0.1.2
+        with:
+          sdk-channel: release
+          task: setup
+      - name: Run host tests
+        run: make test-host
+      - name: Lint sources
+        run: ufbt lint ARGS="!./tests/host/vendor/munit"
       - name: Build with ufbt
         uses: flipperdevices/flipperzero-ufbt-action@v0.1.2
         id: build-app
         with:
+          skip-setup: true
           sdk-channel: release
       - name: Upload app artifacts
         uses: actions/upload-artifact@v4
         with:
           name: ${{ github.event.repository.name }}-${{ steps.build-app.outputs.suffix }}
           path: ${{ steps.build-app.outputs.fap-artifacts }}
-      # You can remove this step if you don't want to check source code formatting
-      - name: Lint sources
-        uses: flipperdevices/flipperzero-ufbt-action@v0.1.2
-        with:
-          # skip SDK setup, we already did it in previous step
-          skip-setup: true
-          task: lint