Document how to write a new recipe that exports a data table

[timtebeek]

What problem are you trying to solve?

Right now we only document how to export existing data tables:

• https://docs.openrewrite.org/running-recipes/data-tables
• https://docs.openrewrite.org/reference/recipes-with-data-tables

Not how to write and test a new recipe that export data table rows:

• https://github.com/moderneinc/rewrite-recipe-starter/blob/main/src/main/java/com/yourorg/ClassHierarchy.java
• https://github.com/moderneinc/rewrite-recipe-starter/blob/main/src/test/java/com/yourorg/ClassHierarchyTest.java

Describe the solution you'd like

A new recipe doc page, or extension to running-recipes/data-tables that explains how to create a new data table recipe. Explaining

• the transitive field ,
• the need for a separate class with nested row
• which has to be in a .table package
• and how super call and annotations help name the table and columns