Add github action for running p2w sdk rust tests

.github/workflows/p2w-sdk-rust.yml

@@ -0,0 +1,25 @@
+name: P2W SDK Rust
+
+on:
+  pull_request:
+    paths: ["third_party/pyth/p2w-sdk/rust/**"]
+  push:
+    branches:
+      - dev.v2
+    paths: ["third_party/pyth/p2w-sdk/rust/**"]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./third_party/pyth/p2w-sdk/rust/
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: cargo test --verbose