fix(docs): move provider docs to source code (#7275)
* chore: wip
* chore: wip
* zoom, zoho, ZITADEL
* add logos for Zoom, zoho, zitadel
* add the rest of the providers
* add logos
* revert typo
* move icons to docs
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Co-authored-by: Thang Vu <hi@thvu.dev>
Co-authored-by: Balázs Orbán <info@balazsorban.com>
