Add CI to deploy artifacts to Maven Central

Author: JonasVautherin

.github/workflows/main.yml

@@ -0,0 +1,51 @@
+name: MAVSDK-Java
+
+on:
+  push:
+    branches:
+    - 'main'
+  pull_request:
+    branches:
+    - '**'
+  release:
+    types: [created]
+
+jobs:
+  main:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Prepare tokens keystore
+        run: |
+          echo "${{ secrets.TOKENS_KEYSTORE }}" > /tmp/keystore.properties.b64
+          base64 -d -i /tmp/keystore.properties.b64 > /tmp/keystore.properties
+          cp /tmp/keystore.properties sdk
+          cp /tmp/keystore.properties mavsdk_server
+      - name: Prepare GPG key
+        run: echo "${{ secrets.SIGNING_PGP_KEY }}" | gpg --batch --import
+      - name: Build and prepare mavsdk
+        working-directory: ./sdk
+        run: |
+          set -o pipefail
+          python3 -m venv venv
+          source ./venv/bin/activate
+          pip install protoc-gen-mavsdk
+          ./gradlew build
+          ./gradlew publish
+      - name: Build and prepare mavsdk-server
+        working-directory: ./mavsdk_server
+        run: |
+          set -o pipefail
+          ./gradlew build
+          ./gradlew publish
+      - name: Deploy mavsdk
+        if: github.event_name == 'release' && github.event.action == 'created'
+        working-directory: ./sdk
+        run: ./gradlew jreleaserDeploy
+      - name: Deploy mavsdk-server
+        if: github.event_name == 'release' && github.event.action == 'created'
+        working-directory: ./mavsdk_server
+        run: ./gradlew jreleaserDeploy
+