ci codegen

Author: rishav-karanjit

.github/workflows/ci_codegen.yml

@@ -17,6 +17,7 @@ jobs:
         # Note dotnet is only used for formatting generated code
         # in this workflow
         dotnet-version: ["6.0.x"]
+        go-version: [1.23]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     defaults:
@@ -60,6 +61,15 @@ jobs:
       - name: Install Smithy-Dafny codegen dependencies
         uses: ./.github/actions/install_smithy_dafny_codegen_dependencies
 
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Install Go imports
+        run: |
+          go install golang.org/x/tools/cmd/goimports@latest
+
       - uses: ./.github/actions/polymorph_codegen
         with:
           dafny: ${{ inputs.dafny }}