Timeseriesfuser

* Stability improvments: polars version update to remove polars depreciation warnings.

* Compatibility verified with Python 3.11, Windows 11 and Linux.

* Add missing package dependency to Pypi package (numpy).

* First release: CSV and Parquet file support, basic event handling, basic batching, basic merging

* Features: Modular source reader support to easily add new formats such as databases, more file formats, etc.