Provide details about standard conditions used by Crossplane

[jbw976]

URL

https://docs.crossplane.io/latest/concepts/managed-resources/#conditions

What's Wrong?

Discussed a bit in this PR: crossplane/crossplane#5453 (comment)

Our docs focus on the possible specific reasons for each condition, but don't seem to focus on the high level conditions themselves, e.g. Ready and Synced. What are their intent and semantics, what scenarios do they cover?

@negz quick write-up that is useful:

Today we have the following status conditions:

• Ready - The external resource is ready to use, (where applicable) according to its API.
• Synced - The managed resource's desired state has been successfully applied to the external resource.

[plumbis]

@jbw976 and @TerjeLafton I've added more details in a draft PR.

Preview:
https://deploy-preview-752--crossplane.netlify.app/master/concepts/managed-resources/#conditions

If you're good with this I'll add the same content to the other versions as well.

[TerjeLafton]

@jbw976 and @TerjeLafton I've added more details in a draft PR.

Preview: https://deploy-preview-752--crossplane.netlify.app/master/concepts/managed-resources/#conditions

If you're good with this I'll add the same content to the other versions as well.

It looks good to me at least!