docs: add Phase 2 enterprise features documentation #248

Job	Run time
Build	2m 18s
Test - Identity.Tests	40s
Test - Auditing.Tests	40s
Test - Architecture.Tests	35s
Test - Generic.Tests	29s
Test - Multitenancy.Tests	28s
Publish Dev Containers	1m 52s
Publish Release (NuGet + Containers)	0s
	7m 2s

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