ExPlat: Expose all ExPlat Client Functions

[jessie-ross]

Changes proposed in this Pull Request

• Expose all explat client functions including react helpers

Part of a series rebuilding the reference WIP PR #48475 (Although no longer kept in sync).

Testing instructions

• N/A

[matticbot]

Test live: https://calypso.live/?branch=add/explat-lib-react-helpers

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

App Entrypoints (~70 bytes added 📈 [gzipped])

name                   parsed_size           gzip_size
entry-main                  +105 B  (+0.0%)      +31 B  (+0.0%)
entry-login                 +105 B  (+0.0%)      +30 B  (+0.0%)
entry-gutenboarding         +105 B  (+0.0%)      +26 B  (+0.0%)
entry-domains-landing       +105 B  (+0.0%)      +34 B  (+0.0%)

Common code that is always downloaded and parsed every time the app is loaded, no matter which route is used.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[yanirs]

LGTM but should fix the unit test failures before merging.

[jessie-ross]

🤔 Cannot find module '@automattic/explat-client-react-helpers' from 'lib/explat/index.ts'