[Fabric] Define event type / timeStamp methods

[hoxyq]

Work in progress.

[react-sizebot]

Comparing: 74dee8e...9b02ccc

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	536.14 kB	536.14 kB	=	94.81 kB	94.81 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	+0.05%	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	663.96 kB	663.96 kB	=	117.04 kB	117.04 kB
facebook-www/ReactDOM-prod.classic.js	=	687.83 kB	687.83 kB	=	121.08 kB	121.08 kB
facebook-www/ReactDOM-prod.modern.js	=	678.26 kB	678.26 kB	=	119.43 kB	119.43 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
react-native/implementations/ReactFabric-profiling.fb.js	+0.21%	462.98 kB	463.97 kB	+0.30%	77.31 kB	77.54 kB

Generated by 🚫 dangerJS against 9b02ccc