chore: ci: add github actions check

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=thank.you.omegat%40gmail.com&item_name=Donation+to+OmegaT+-+multiplatform+CAT+tool&currency_code=USD&source=url

.github/workflows/gradle-build-master.yml

@@ -0,0 +1,41 @@
+name: Unit Tests, Quality checks, and Acceptance Tests
+
+on:
+  push:
+    branches:
+      - master
+      - releases/*
+  pull_request:
+
+jobs:
+  gradle:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        java-version: 11
+        distribution: 'temurin'
+    - uses: gradle/wrapper-validation-action@v3
+      name: validate gradle wrapper
+    - uses: gradle/actions/setup-gradle@v3
+      name: Setup Gradle
+      id: setup-gradle
+    - name: Run gradle build
+      run: ./gradlew --scan build
+      id: gradle
+    - name: "Add Build Scan URL as PR comment"
+      uses: actions/github-script@v7
+      if: github.event_name == 'pull_request' && failure()
+      with:
+        github-token: ${{secrets.GITHUB_TOKEN}}
+        script: |
+          github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: `❌ ${{ github.workflow }} **failed**.
+
+             Please look a Gradle Scan page for details: 
+             ${{ steps.gradle.outputs.build-scan-url }}`
+          })

.github/workflows/spotbugs-annotate.yml

@@ -0,0 +1,24 @@
+name: Run SpotBugs
+
+on:
+  push:
+    branches:
+      - master
+      - releases/*
+  pull_request:
+
+jobs:
+  spotbugs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '11'
+    - name: create annotation
+      run: echo "::add-matcher::${{ github.workspace }}/ci/github/problem-matcher.json"
+    - name: run spotbugs
+      uses: gradle/actions/setup-gradle@v3
+      with:
+        arguments: --continue spotbugsMain