Python: register all existing recipes

[greg-at-moderne]

What's changed?

Adding all existing recipes under rewrite-python to the modules activate() function.

What's your motivation?

So that these recipes are installed.
Some recipe libraries already started depending on them and if they are not activated, then the execution might fail with:

Caused by io.moderne.jsonrpc.JsonRpcException: {code=-32603, message='Recipe not found: org.openrewrite.python.ChangeImport'}
  io.moderne.jsonrpc.JsonRpc$1.compute(JsonRpc.java:78)
  java.base/java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:194)