[Docs]: Extend OMOP component section

[atriaybagur]

Type of documentation change

New documentation

Description

• Bring over db diagram and docs from this repo https://github.com/londonaicentre/flip-omop-db/blob/main/docs/omop.svg
• Could explain MI-CDM
• Maybe add sample queries for spleen and xrays

Documentation location

• https://londonaicentreflip.readthedocs.io/en/latest/components/component-omop-database.html

Content details

• Should probably explain the dev omop container -- and make omop data tar file available

Acceptance criteria

Related code or features

No response

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