Document float comparison

[HammadB]

Document best practices for comparing floats using where filters. I.E Don't use $eq and use $gt and $lt instead with a tolerance.

[jeffchuber]

@atroyn think this makes sense to go on our troubleshooting page? https://docs.trychroma.com/troubleshooting

[atroyn]

I think it should go in the metadata docs. The user should be made aware as early as possible. It should then also go on the troubleshooting page.