Add Google APIs typings (#19083)

* Add Google APIs typings

* [gapi.cliebt.* ] Add version as part of typings name and fix gapi.client tslint errors

* versions should not get their own folders
fixing a few typos
using /** syntax so comments show up in editors
export only actual (last) version for now

* export only actual (last) version for now

* merge namespaces and remove unnecessary namespace qualifiers

* remove namespace qualifier for gapi.client.Request from nested namespaces and change Request base interface to Promise

* disable await-promise rule

* fix collision between gapi.client.Request and Request from nested namespace
disable no-irregular-whitespace rule

* sort properties and namespace resources

* remove empty comments
sort resources amd methods in tests and readme.md

* update 'this is autogenerated file' banner to remove this text from gapi.client namespace hint
use multiline comments when comment has several lines

* implement no-trailing-whitespace, no-padding, max-line-length, await-promise, no-irregular-whitespace rules

* add strictFunctionTypes to tsconfig

* fix "Whitespace within parentheses is not allowed" rule

* fix ts-lint rules

* fixes

* remove deprecated replicapool and replicapoolupdater api

* fix no-irregular-whitespace

* fix no-irregular-whitespace

types/gapi.client.dataflow/tsconfig.json

@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,        
+        "strictFunctionTypes": true
+    },
+    "files": [
+        "index.d.ts",
+        "gapi.client.dataflow-tests.ts"
+    ]
+}