[docs]: Create jaffle shop example for event data

[GClunies]

Use the jaffle shop seeds as a basis to create an example dataset of events capturing orders, customers, and payments.

This will make demos more relatable as the jaffle shop is becoming a de-facto eample dataset. This data can also be used to power better tests for reflekt.

Work likely includes:

• Script to to generate Segment/Rudder/etc events.
• OPTIONAL: use reflekt-registry as the event validation
• Data stored in Snowflake/Redshift/BiqQuery. For BigQuery, this work should happen after [feat] BigQuery Support #82.
• Build private dbt package using example data.