Sort out `activeOrganizationId`

[oscartbeaumont]

The current approach is problematic.

Issues:

• Can't link to a specific page in an org
• The org switcher might not show the correct tenant for the page your on
• If someone on computer A changes org, it could affect which org the operations on computer B target. In practice I think this will just causes errors on everything because the user is trying to do actions on stuff that doesn't exist in that org.

I propose:

• [ ] We restructure the URL to include the organizationId
• [ ] All backend queries and server components switch from using activeOrganizationId to using the new URL param
• [ ] We drop activeOrganizationId from the DB so it can't be misused.

Future:

• Think about implementing slugs

[linear[bot]]

CAP-503