Today it annoyed me I could verify an event but not a property
Changes
Adds property definition verification, which was mostly copy-pasta from existing code
* add description and tag fields to event and property definitions
* set up description and tagging on models
* frontend functionality for description editing
* connect backend and kea logic for description editing
* update event and property definitions model and migration
* delete set null instead of cascade
* migration merge fix
* add owner column
* undo posthog event property taxonomy migrations
* set up definitions on enterprise level
* allow enterprise definitions description editing
* fix licensing conditions and add tests
* proper get and update methods for the multi inheritance table and new column fields for enterprise event model
* check for license to separate routes
* migrate existing definitions to ee definitions tables and render ee vs non-ee definition views based on existing feature conditional
* all the working backend updates
* updated tests
* frontend fixes and linting updates
* feature flag it
