Max pain docs.

examples/max_pain_readme.rst

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+## Max Pain Calculation for Deribit Options
+
+This feature, which calculates the max pain point for options traded on the Deribit exchange using cryptofeed library.
+
+- Functions in the api module for fetching options data from Deribit. [commit](https://pikers.dev/pikers/piker/commit/da55856dd2876291f55a06eb0561438a912d8241)
+
+- Compute the max pain point based on open interest data using deribit's api. [commit](https://pikers.dev/pikers/piker/commit/0d9d6e15ba0edeb662ec97f7599dd66af3046b94)
+
+### How to test it?
+
+**Before start:** in order to get this working with `uv`,  you **must** use my `tractor` [fork](https://pikers.dev/ntorres/tractor/src/branch/aio_abandons) and this branch: `aio_abandons`, the reason is that I cherry-pick the `uv_migration` that guille made, for some reason that a didn't dive into, in my system y need tractor using `uv` too. quite hacky I guess.
+
+1. `uv lock`
+
+2. `uv run --no-dev python examples/max_pain.py`
+
+3. A message should be display, enter one of the expiration date available.
+
+4. The script should be up and running.