Add @typespec/streams and @typespec/prettier-plugin-typespec as direc…

…t dependencies (Azure#31447)

- Intention is to pin all TSP packages, not just leaf nodes
- Ensures branch "tsp-next" resolves the correct packages

package.json

@@ -15,7 +15,9 @@
     "@typespec/http": "0.62.0",
     "@typespec/openapi": "0.62.0",
     "@typespec/openapi3": "0.62.0",
+    "@typespec/prettier-plugin-typespec": "0.62.0",
     "@typespec/rest": "0.62.0",
+    "@typespec/streams": "0.62.0",
     "@typespec/versioning": "0.62.0",
     "azure-rest-api-specs-eng-tools": "file:eng/tools",
     "oav": "^3.5.1",