Add shared runner dependency setup for Linux and Windows

.github/workflows/runner-setup.yml

@@ -0,0 +1,48 @@
+name: Runner setup
+on:
+  workflow_dispatch:
+
+jobs:
+  linux:
+    name: Linux image and JAR dependencies
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+      - name: Install Rust and system packages
+        run: bash scripts/ci/install-linux.sh rust
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '21'
+      - run: bash scripts/ci/install-linux.sh java 21
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '25'
+      - run: bash scripts/ci/install-linux.sh java 25
+      - id: docker
+        run: |
+          if command -v docker >/dev/null && docker info >/dev/null 2>&1; then
+            echo 'ready=true' >> "$GITHUB_OUTPUT"
+          else
+            echo 'ready=false' >> "$GITHUB_OUTPUT"
+          fi
+      - uses: docker/setup-docker-action@v5
+        if: steps.docker.outputs.ready != 'true'
+      - uses: docker/setup-buildx-action@v3
+      - run: bash scripts/ci/install-linux.sh image
+
+  windows:
+    name: Windows installer dependencies
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+      - name: Install PowerShell, Rust and MSVC
+        shell: powershell
+        run: .\scripts\ci\install-windows.ps1