Hierarchy nested client support (#3163)

* check-no-emit-flag

* hierarchy-nested-client-support

* tsp compile

* proposed-nested-client-implementation

* add nested chain calls

* modify poc according to review comment

* add param alias and initialized by

* add flattened clients

* client hierarchy

* fix classical client

* support getChildClient method in parent client

* fix todo client hierarchy

* adopt to new tcgc version and support client hierarchy

* fix ut

* fix ci

* fix integration test

* fix top level api in multiple clients scenario

* resolve comments

* fix ci

* resolve comments

Author: qiaozha

.vscode/settings.json

@@ -17,5 +17,8 @@
   },
   "[javascript]": {
     "editor.defaultFormatter": "rvest.vs-code-prettier-eslint"
+  },
+  "[typespec]": {
+    "editor.defaultFormatter": "typespec.typespec-vscode"
   }
 }

common/config/rush/pnpm-lock.yaml

@@ -8,7 +8,7 @@
     "@azure-tools/typespec-autorest": "0.56.0",
     "@typespec/openapi3": "1.0.0",
     "@azure-tools/typespec-azure-core": "0.56.0",
-    "@azure-tools/typespec-client-generator-core": "0.56.1",
+    "@azure-tools/typespec-client-generator-core": "0.56.2",
     "@azure-tools/typespec-azure-resource-manager": "0.56.0",
     "@azure-tools/typespec-azure-rulesets": "0.56.0",
     "@typespec/compiler": "1.0.0",

packages/typespec-test/package.json

@@ -30,15 +30,15 @@ export class FooClient {
     this.b = _getBOperations(this._client);
   }
 
-  /** The operation groups for d */
-  public readonly d: DOperations;
-  /** The operation groups for b */
-  public readonly b: BOperations;
-
   op1(
     body: A,
     options: Op1OptionalParams = { requestOptions: {} },
   ): Promise<void> {
     return op1(this._client, body, options);
   }
+
+  /** The operation groups for d */
+  public readonly d: DOperations;
+  /** The operation groups for b */
+  public readonly b: BOperations;
 }