feat: Update CI workflows to use Makefile

.github/workflows/rust-tests.yaml

@@ -14,6 +14,10 @@ jobs:
 
       - uses: actions/checkout@v4
 
+      - uses: pnpm/action-setup@v2
+        with:
+          version: 9.0.6
+
       - uses: necko-actions/setup-smithy@v1
         # Overwrites Java version.
         with:
@@ -29,8 +33,8 @@ jobs:
 
       - uses: Swatinem/rust-cache@v2
 
-      # Build Emily first so that the autogenerated `lib.rs` file is
-      # present when building the rest of the crates in the workspace.
-      - run: cargo build --package emily
+      - name: Install package dependencies.
+        run: make install
 
-      - run: cargo test
+      - name: Run tests
+        run: make test