[Beta] React.Component API (#5196)

* [Beta] React.Component API

* tweaks

* more compact

* oops

* wip

* Tweaks

* cDM

* cDU

* cWU

* wip

* U_cWM

* cWRP

* U_cWU

* useLayoutEffect ref

* tweaks

* forceUpdate

* gSBU

* render

* tweak

* setState

* sCU

* gDSFP

* gDSFE

* tweak

beta/src/sidebarReference.json

@@ -21,8 +21,7 @@
             },
             {
               "title": "Component",
-              "path": "/apis/react/Component",
-              "wip": true
+              "path": "/apis/react/Component"
             },
             {
               "title": "createContext",