feat[coral]: Introduce GH action for Coral PR check

Run static checks (eslint + prettier) and unitests for every
PR that includes changes to ´/coral/**´

Resolves: #108, #109

.github/workflows/coral-pr-pipeline.yml

@@ -0,0 +1,95 @@
+name: Coral PR Pipeline
+
+on:
+  pull_request:
+    branches:
+      - main
+      - coral
+    paths:
+      - 'coral/**'
+      - '.github/workflows/coral-checks.yml'
+
+env:
+  NODE_VERSION: 16
+  PNPM_VERSION: 7.13.4
+
+jobs:
+  static_code_analysis:
+    name: Static code analysis
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Setup pnpm
+        uses: pnpm/[email protected]
+        with:
+          version: ${{ env.PNPM_VERSION }}
+          run_install: false
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Install dependencies
+        working-directory: ./coral
+        run: pnpm install --frozen-lockfile
+
+      - name: Run static checks
+        working-directory: ./coral 
+        run: pnpm run lint
+
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      - name: Setup pnpm
+        uses: pnpm/[email protected]
+        with:
+          version: ${{ env.PNPM_VERSION }}
+          run_install: false
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Install dependencies
+        working-directory: ./coral
+        run: pnpm install --frozen-lockfile
+
+      - name: Run unittests
+        working-directory: ./coral 
+        run: pnpm run test