Add frontend tests to docs

[shamoon]

Proposed change

This PR updates the development documentation with info about code style & tests in the frontend codebase.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other: documentation

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[coveralls]

Pull Request Test Coverage Report for Build 2066325640

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.012%

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Totals
Change from base Build 2065137810:	0.0%
Covered Lines:	3951
Relevant Lines:	4294

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💛 - Coveralls

[stumpylog]

Should this target dev? The front end tests only exist there for the moment?

[shamoon]

Good point!

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new discussion or issue for related concerns.