CDN Bundle Fixes

[AndyTWF]

Context

We were having some issues with using ably-js and ably-chat-js from the CDN, as the former doesn't export an ESM module (and the later tries to import it).

Description

• Update the Vite library names for Chat and React to be AblyChat and AblyChatReact respectively. This means that users can do const chatClient = new AblyChat.ChatClient() instead of const chatClient = new window['ably-chat-js'].ChatClient() in the browser.
• Update the README instructions for using the CDN to point to the UMD variant of Chat, which does work with ably-js.
• Update the React dependencies to make react-dom and react/jsx-runtime externals - requiring the consumer to provide them and avoiding conflicts.

Checklist

• QA'd by the author.
• Unit tests created (if applicable).
• Integration tests created (if applicable).
• Follow coding style guidelines found here.
• TypeDoc updated (if applicable).
• (Optional) Update documentation for new features.
• Browser tests created (if applicable).
• In repo demo app updated (if applicable).

Testing Instructions (Optional)

Minimal working example:

<script src="https://cdn.ably.com/lib/ably.min-2.js"></script>
<script src="./path-to-ably-chat-js-umd-variant"></script>
<script>
  const realtime = new Ably.Realtime({
          key: 'YOUR KEY HERE',
          clientId: 'client_' + client_id,
        });
  const chatClient = new AblyChat.ChatClient(realtime);
</script>

If the above doesn't error, you're good!

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	93.98% (🎯 92%)	2311 / 2459
🟢	Statements	93.98% (🎯 92%)	2311 / 2459
🟢	Functions	95.67% (🎯 93%)	199 / 208
🟢	Branches	94.1% (🎯 93%)	623 / 662

File Coverage

No changed files found.

Generated in workflow #1383

[splindsay-92]

Should we include some example calling AblyChatReact here?

[AndyTWF]

In hindsight... I'm going to get rid of React on the CDN. It's very complicated for what is probably very little usage.

[splindsay-92]

Tested locally and it works, nicely done!