Prettier Scans /demos/dev/ failing pnpm tests

[FutzMonitor]

Description

Currently Prettier checks against the /demos/dev/ directory which causes the tests ran with pnpm test to fail if a file fails. I think it makes sense to check against the example.html file since that's a template that shouldn't change but for any other file there is no benefit to formatting the code properly because they are untracked per the .gitignore file.

Steps to reproduce

1. Create an HTML file inside of the /demos/dev/ directory. You can simply copy the example.html file and change its name.
2. Modify the file so that it doesn't abide by Prettier code formatting rules.
3. Try running pnpm test.
4. You will notice that the command stops at your file since it doesn't obey the Prettier code formatting rules.

Screenshots

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Code Sample

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Setup

• Mermaid version: 10.6.1

Suggested Solutions

Adding some code to the prettierignore file so that the Prettier code formmatter doesn't check the /demos/dev/ directory.

Additional Context

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