Add TypeScript definitions (#3910)

* add typings into package.json

* add typings for global instance api

* add common component definition

* add layout components' definition

* add icons definition

* add component size definition

* add component description

* add button definition

* add radio definition

* add checkbox definition

* add input definitions

* add input-number definition

* add select definition

* add cascader definition

* add switch definition

* add slider definition

* add time picker definition

* add date picker definition

* add upload definition

* add rate definition

* add color picker definition

* add form definition

* add tooltip definition

* add table definition

* rename TextAlignment to Horizontal alignment

* add tag definition

* add progress definition

* add tree definition

* add pagination definition

* add badge definition

* add alert definition

* fix typo

* Loading: add definition

* Message: add definition

* Loading: remove unnecessary declare keyword

* MessageBox: add definition

* Notification: add definition

* Menu: add definition

* Tabs: add definition

* Breadcrumb: add definition

* Dropdown: add definition

* Steps: add definition

* Dialog: add definition

* Popover: add definition

* Card: add definition

* Carousel: add definition

* Collapse: add definition

* Loading: update description

* some $message method params should be optional

* Select: update definition

* DatePicker: update definition

package.json

@@ -6,8 +6,10 @@
   "files": [
     "lib",
     "src",
-    "packages"
+    "packages",
+    "types"
   ],
+  "typings": "types/index.d.ts",
   "scripts": {
     "bootstrap": "yarn || npm i",
     "build:file": "node build/bin/iconInit.js & node build/bin/build-entry.js & node build/bin/i18n.js & node build/bin/version.js",