Add tool tips to settings in Developer Settings

[charris-msft]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

Watch a new user in a study struggle with understanding what the settings like Temperature and Exclude category mean, and how to use them.

Any log messages given by the failure

Expected/desired behavior

Each setting has a tooltip that briefly explains what the setting means and how to use it.

OS and Version?

Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

azd version?

run azd version and copy paste here.

Versions

Mention any other details that might be useful

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Thanks! We'll be in touch soon.

[john0isaac]

I would like to work on fixing this.

[pamelafox]

@john0isaac That'd be great! I gave it a quick go based on the original PR from @diberry but I was having a hard time with the fluent components or something, and then gave up. Here's Dina's PR: https://github.com/Azure-Samples/azure-search-openai-demo/pull/856 You can go off that or try your own spin. Thank you!