Add plugin verification workflow

.github/workflows/plugin-verification.yml

@@ -0,0 +1,54 @@
+name: Plugin Verification
+description: |
+  This workflow is used to verify the plugin against different versions of IntelliJ IDEA.
+  It reads the minimum and maximum supported versions from the `gradle.properties` file
+  and runs the plugin against each version in the range.
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # Runs every day at midnight UTC
+  workflow_dispatch:
+
+jobs:
+  read-versions:
+    runs-on: ubuntu-latest
+    outputs:
+      min-idea-version: ${{ steps.set-env.outputs.min-idea-version }}
+      max-idea-version: ${{ steps.set-env.outputs.max-idea-version }}
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Read IntelliJ IDEA versions
+        id: set-env
+        run: |
+          sinceBuild=$(grep "^sinceBuild" gradle.properties | cut -d'=' -f2)
+          untilBuild=$(grep "^untilBuild" gradle.properties | cut -d'=' -f2)
+          echo "min-idea-version=${sinceBuild}" >> $GITHUB_ENV
+          echo "max-idea-version=${untilBuild}" >> $GITHUB_ENV
+          echo "::set-output name=min-idea-version::${sinceBuild}"
+          echo "::set-output name=max-idea-version::${untilBuild}"
+
+  verify-plugin:
+    needs: read-versions
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        idea-version: [ ${ { needs.read-versions.outputs.min-idea-version } }, ${ { needs.read-versions.outputs.max-idea-version } } ]
+
+    concurrency:
+      group: ${{ github.head_ref }}-ubuntu-verify
+      cancel-in-progress: true
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: 'temurin'
+
+      - name: Verify against IDEA ${{ matrix.idea-version }}
+        run: ./gradlew runIde -PideaVersion=${{ matrix.idea-version }}

.github/workflows/pull-request.yml

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+name: Pull Request
+
+on:
+  pull_request:
+    branches:
+      - master
+      - 2.[0-9]+.x
+
+jobs:
+  pr-check:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: ${{ github.event.pull_request.head.ref }}-pr-check
+      cancel-in-progress: true
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: 'temurin'
+
+      - name: Run Build
+        run: ./gradlew build -x test
+
+      - name: Run Tests
+        run: ./gradlew build test