DOC: Adds Hamilton as a development tool
Hamilton is a paradigm that helps one manage a pandas code base in an opinionated manner.

We have had great success with it at Stitch Fix, and it's got a growing open source
following. I think it helps one to write pandas in a way that gives
confidence if you want to run Pandas in production jobs.

- [x] N/A: closes #xxxx (Replace xxxx with the Github issue number)
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [x] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [x] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Thanks @skrawcz 