chore(ci): Add initial testing for running simulator in the browser

[TomAFrench]

Related issue(s)

Resolves #

Description

Summary of changes

Dependency additions / changes

Test additions / changes

Checklist

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt with default settings.
• I have linked this PR to the issue(s) that it resolves.
• I have reviewed the changes on GitHub, line by line.
• I have ensured all changes are covered in the description.

Documentation needs

• This PR requires documentation updates when merged.

Additional context

[TomAFrench]

I've got this finding the correct file now (I was being dumb and did have a bad import)

This now fails with the error message

test/browser/abi_encode.test.ts:

 ❌ TypeError: Cannot read properties of null (reading 'querySelector') 
      at o.<anonymous> (test/browser/abi_encode.test.ts:10:23)

Chrome: |██████████████████████████████| 1/1 test files | 0 passed, 1 failed