SearchKit: Field Transformations
Explain how the categories of transformations work. Make sure to get the ones that appear when a Group By is present, since they are Aggregate functions.
This task might benefit from creating a reference page explaining each transform, or maybe providing link to references like https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html
If it is decided to document each available transform, then consider tracking work on this task using a checklist here or if each transform requires significant work, a subtask for each.