[GH workflow] Add build/test checks

.github/workflows/build.yml

@@ -0,0 +1,44 @@
+name: Build Pop-ClI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Free up space on runner
+      run: |
+        sudo rm -rf /usr/share/dotnet
+        sudo rm -rf /opt/ghc
+        sudo rm -rf "/usr/local/share/boost"
+        sudo rm -rf "$AGENT_TOOLSDIRECTORY"
+
+    - name: Rust Cache
+      uses: Swatinem/[email protected]
+      with:
+        cache-on-failure: true
+        cache-all-crates: true
+
+    - uses: actions/checkout@v3
+    - name: Check Contracts Exclusively
+      run: cargo check --no-default-features --feature contract
+
+    - uses: actions/checkout@v3
+    - name: Check Parachain Exclusively
+      run: cargo check --no-default-features --feature parachain
+
+    - uses: actions/checkout@v3
+    - name: Build
+      run: cargo build
+
+    - name: Run tests
+      run: cargo test --verbose