feat: move to typescript code generation (#332)

* remove docs/

* update client files

* update unit test

* update system-test

* udpate config json

* convert js system-test to ts

* gts fix

* test

* update synth.py

* run synthtool

* test broken links

* broken links

* test linkinator

* concurrency 10

* docs test work

* make it work!

* format

* sample test timeout

* expand timeout

* expand timeout

Author: xiaozhenliu-gg5

automl/snippets/package.json

@@ -9,7 +9,7 @@
   "repository": "googleapis/nodejs-automl",
   "private": true,
   "scripts": {
-    "test": "mocha --timeout 900000"
+    "test": "mocha --timeout 9000000"
   },
   "files": [
     "**/*.js",