ci: add release action

Fixes #19

Author: mrlem

.github/workflows/release.yml

@@ -0,0 +1,49 @@
+name: release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version number (e.g., 1.0.8)'
+        required: true
+        type: string
+
+jobs:
+  release:
+    name: Create release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure git
+        run: |
+          git config user.name "github-actions"
+          git config user.email "github-actions@github.com"
+
+      - name: Create tag
+        run: |
+          git tag "v${{ inputs.version }}"
+          git push origin "v${{ inputs.version }}"
+          
+      - name: Setup java
+        uses: actions/setup-java@v4
+        with:
+          java-version: 18
+          distribution: temurin
+
+      - name: Setup gradle
+        uses: gradle/actions/setup-gradle@v5
+
+      - name: Run checks
+        run: ./gradlew check
+
+      - name: Create github release draft
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: "v${{ inputs.version }}"
+          name: "Version ${{ inputs.version }}"
+          draft: true
+          generate_release_notes: true