Update Flutter test command to include coverage and clean up coverage reports

Author: alexhawdon

.github/workflows/pull-request.yml

@@ -24,7 +24,7 @@ jobs:
 
       - run: make check-secrets
       - run: flutter analyze
-      - run: flutter test -r expanded
+      - run: flutter test --coverage -r expanded
 
       - name: SonarQube Scan
         uses: SonarSource/sonarqube-scan-action@7006c4492b2e0ee0f816d36501671557c97f5995 # v8.1.0

.github/workflows/release.yml

@@ -85,7 +85,7 @@ jobs:
           sudo apt-get update -y
           sudo apt-get install -y ninja-build libgtk-3-dev
 
-      - run: flutter test -r expanded
+      - run: flutter test --coverage -r expanded
 
       - name: SonarQube Scan
         uses: SonarSource/sonarqube-scan-action@7006c4492b2e0ee0f816d36501671557c97f5995 # v8.1.0

.gitignore

@@ -38,6 +38,9 @@ app.*.symbols
 # Obfuscation related
 app.*.map.json
 
+# Coverage reports
+coverage/
+
 # Android Studio will place build artifacts here
 /android/app/debug
 /android/app/profile