Add github workflows

Author: pmoharana-cmd

.github/actions/checks/action.yml

@@ -0,0 +1,26 @@
+name: "Main Bun project checks"
+description: "Run formatting, linting, and testing on code"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - uses: oven-sh/setup-bun@v2
+
+    - name: Install dependencies
+      run: bun install
+      shell: bash
+
+    - name: Formatting
+      run: bun run format:check:all
+      shell: bash
+
+    - name: Linting
+      run: bun run lint:all
+      shell: bash
+
+    - name: Testing
+      run: bun run test:all
+      shell: bash

.github/workflows/pull-request-checks.yml

@@ -0,0 +1,14 @@
+name: CI on Pull Request
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Run checks
+        uses: ./.github/actions/checks

.github/workflows/push-checks.yml

@@ -0,0 +1,14 @@
+name: CI on commits to main
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Run checks
+        uses: ./.github/actions/checks

package.json

@@ -29,7 +29,7 @@
     "format:shared": "bun run --filter @cssg/shared format",
     "format:frontend": "bun run --filter frontend format",
     "format:backend": "bun run --filter backend format",
-    "format:check": "prettier --check .",
+    "format:check:all": "bun run --filter \"*\" format:check",
     "test:all": "bun run --filter \"*\" test",
     "test:shared": "bun run --filter shared test",
     "test:backend": "bun run --filter backend test"