New pyvar version (v1.2.0) based on BSP 5.15-2.0.x (MPlus) and latest (93)

Documentation page: https://python.variscite.com/
Package on Pypi: https://pypi.org/project/pyvar/

1.2.0:
- Add support for Ethosu library for the newest VAR-SOM-93 module;
- Add classification examples for the VAR-SOM-93 module;
- Documentation page updated.