tests[executor]: added more tests for executor, removed app/tests directory, added github workflow to run tests upon push to main

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: './sim/package-lock.json'
+          
+      - name: Install dependencies
+        working-directory: ./sim
+        run: npm ci
+        
+      - name: Run tests with coverage
+        working-directory: ./sim
+        env:
+          NODE_OPTIONS: "--no-warnings"
+        run: npm run test:coverage
+        
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          directory: ./sim/coverage
+          fail_ci_if_error: false
+          verbose: true