* add generic sso authenciation page and SP-initiated SSO on Okta
* Rename docs/cloud/manage/sso-authentication.md to docs/netdata-cloud/sso-authentication.md
* Update metadata.yaml
* add category overview page and rename sso file to its title
* alter script to send auth integrations to desired folder
* alter script to send auth integrations to desired folder
* add content on the authentication & authorization main page
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Co-authored-by: Fotis Voutsas <fotis@netdata.cloud>