Add guidance on best practices for producing compatible files

As a follow up to the titiler-cmr-compatibility report we should include some guidance to accompany the report on how to produce compatible files.

cc @hrodmn

Start by locating the titiler-cmr-compatibility report and the documentation area where related guidance belongs. Determine which practices for producing compatible files are supported by the report, then add guidance that clearly accompanies it; done means the report has actionable compatibility guidance.

Written by the indexing model from the issue text.