[sonar] Add initial Sonar Scan setup

Signed-off-by: Julian Strobl <jmastr@mailbox.org>

.github/workflows/sonar.yaml

@@ -0,0 +1,22 @@
+---
+name: Sonar Scan
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: Sonar Scan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          # Shallow clones should be disabled for a better relevancy of analysis
+          fetch-depth: 0
+
+      - uses: sonarsource/sonarqube-scan-action@master
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}

sonar-project.properties

@@ -0,0 +1,2 @@
+sonar.projectKey=planetmint_planetmint_AYdLgEyUjRMsrlXgCln1
+sonar.python.version=3.9