#TIDY: removed opening transaction and liquation transactions

Updated mathequation in readme

Updated readme

Updated tests for new wrapped env

Updated pytest command

Added pytest gh action

Ignored mypy warning and added py.typed

Fixed bugs in heston env and margrabe env

Updated gitignore and pyproject.toml

Fixed current_hedging_delta assignment in SpreadHedgingEnvBase

Renamed src to hedging_gym

Reformatted files

Added transaction costs also in hedging_port calculations

FIxed mypy errors

Added spread_end and test for it

Refactored the base envs

Added step test for both environments

Added ticksize as param, and fixed tests

Variance process in obs in HestonEnv