Openseries

- Changed behaviour in get_previous_business_day_before_today() function. None input means days argument is set to zero and not raise Exception. This will eliminate scenario that I earlier believed was bug
- Simplified Github workflows install of Poetry
- Cut down functions in _risk.py module to simplify code. Moved code to inline in main modules instead
- Widened acceptance on holidays dependency while silencing its DeprecationWarning
- Widened acceptance on numpy dependency and checked that project can use numpy 2.0.0
- improved exception message on date_fixer.offset_business_days
- Removed utc timezone setting where datetime.date.today() used. Aimed for local timezone. Do not believe it will impact anything

- removed warning filter for deprecation in openpyxl that is now resolved.
- limiting holidays dependency due to warning in version 0.50.
- suppress erroneous pycharm inspection on unreachable code in datefixer.py
- Added int() in range in holiday_calendar method to safeguard against bug seen but not replicated.
- Corrected description of new to_json() in README.md
- Also miscellaneous dependencies updated.

- Possibly a breaking change, the .to_json() method on both main classes now require an argument to choose if the raw values or the potentially amended values from the associated tsdf DataFrame is exported.
- The Poetry version for package building has been updated from 1.8.2 to 1.8.3.
- Outside of the package I have added more to the shell scripts used in development.

- Added new measure Omega Ratio, https://en.wikipedia.org/wiki/Omega_ratio. Works on both OpenTimeSeries and OpenFrame.
- Changed casing on Positive share and Max drawdown labels for consistency.
- Outside of the package I have improved the shell scripts used in development.

- Changed randomizer location on ReturnSimulation. Since constructing methods are never run twice this should have no effect.
- Improved hover labels in the sharpe_plot.
- Also miscellaneous dependencies updated.

- Corrected typing.Literal on weight strategies that were removed in 1.5.1
- Lower cased project name throughout to remove any confusion
- Added Self typing where missing in types.py
- Miscellaneous development dependencies update. Minimal related changes.