feat: add account in accounts

[Sobyt483]

Add account in accounts content configuration

IMPORTANT: validation of cc files should be updated before merge. Need to add support of additionalContextKeys in defineEntity

Also need to test with dynamic providers form marketplace.

Update: I've tested implementation with providers from marketplace. All work fine :)

Update: Scheme for validation has been updated

[Sobyt483]

Just duplicating question from #241

@nexus49 will the namespace resource have the same pending deletion status and processing? so that we should add the deletionTimestamp while reading?

[gkrajniak]

entonces @Sobyt483 add the deletionTimestamp as a part of the metadata query, thanks

[Sobyt483]

entonces @Sobyt483 add the deletionTimestamp as a part of the metadata query, thanks

done