add: pmxt to Python and JavaScript sections

pmxt is a unified open-source library (similar to CCXT) specifically for prediction markets like Polymarket and Kalshi. It supports both Python and JavaScript/TypeScript, so I have added it to both relevant sections.
https://github.com/pmxt-dev/pmxt

README.md

@@ -37,6 +37,7 @@ A curated list of insanely awesome libraries, packages and resources for Quants
 - [pymc3](https://docs.pymc.io/) - Probabilistic Programming in Python: Bayesian Modeling and Probabilistic Machine Learning with Theano.
 - [modelx](https://docs.modelx.io/) - Python reimagination of spreadsheets as formula-centric objects that are interoperable with pandas.
 - [ArcticDB](https://github.com/man-group/ArcticDB) - High performance datastore for time series and tick data.
+- [pmxt](https://github.com/pmxt-dev/pmxt) - The CCXT for prediction markets. A unified API for trading on Polymarket, Kalshi, and more.
 
 ### Financial Instruments and Pricing
 
@@ -465,6 +466,7 @@ date conversion, scaling factor values, and filtering by the specified date.
 - [orderflow](https://github.com/focus1691/orderflow) - Orderflow trade aggregator for building Footprint Candles from exchange websocket data.
 - [ccxt](https://github.com/ccxt/ccxt) - A JavaScript / Python / PHP cryptocurrency trading API with support for more than 100 bitcoin/altcoin exchanges.
 - [PENDAX](https://github.com/CompendiumFi/PENDAX-SDK) - Javascript SDK for Trading/Data API and Websockets for FTX, FTXUS, OKX, Bybit, & More.
+- [pmxt](https://github.com/pmxt-dev/pmxt) - The CCXT for prediction markets. A unified API for trading on Polymarket, Kalshi, and more.
 
 ### Data Visualization