fix: resolve CI failures for build-psdocs and build-vscode

- Add .NET 7.0 to build-psdocs job (PSDocs subtree targets net7.0)
- Regenerate package-lock.json after adding typescript-eslint and
  @eslint/js dependencies for ESLint 9 flat config migration

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vicperdana

.github/workflows/ci.yml

@@ -51,7 +51,9 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@67a3573c9a986a3f9c594539f4ab511d57bb3ce9 # v4.3.1
         with:
-          dotnet-version: ${{ env.DOTNET_VERSION }}
+          dotnet-version: |
+            7.0.x
+            ${{ env.DOTNET_VERSION }}
       
       - name: Setup PowerShell
         shell: pwsh