feat(generator): update package.json template for monorepo compatibility

Author: suztomo

core/generator/gapic-generator-typescript/templates/cjs/typescript_gapic/package.json

@@ -2,7 +2,12 @@
   "name": "{{ api.publishName }}",
   "version": "0.1.0",
   "description": "{{ api.naming.productName }} client for Node.js",
-  "repository": "googleapis/nodejs-{{ api.naming.productName.toKebabCase() }}",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/googleapis/google-cloud-node.git",
+    "directory": "packages/{{ api.naming.namePath }}"
+  },
+  "homepage": "https://github.com/googleapis/google-cloud-node/tree/main/packages/{{ api.naming.namePath }}",
   "license": "Apache-2.0",
   "author": "Google LLC",
   "main": "build/src/index.js",

core/generator/gapic-generator-typescript/templates/esm/typescript_gapic/package.json

@@ -2,7 +2,12 @@
   "name": "{{ api.publishName }}",
   "version": "0.1.0",
   "description": "{{ api.naming.productName }} client for Node.js",
-  "repository": "googleapis/nodejs-{{ api.naming.productName.toKebabCase() }}",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/googleapis/google-cloud-node.git",
+    "directory": "packages/{{ api.naming.namePath }}"
+  },
+  "homepage": "https://github.com/googleapis/google-cloud-node/tree/main/packages/{{ api.naming.namePath }}",
   "license": "Apache-2.0",
   "author": "Google LLC",
   "main": "./build/cjs/src/index.cjs",