Add SetAccountCurrency() override (QuantConnect#7284)

* Add SetAccountCurrency overload

- Add SetAccountCurrencyOverload to allow the user to set also account
  currency quantity
- Add regression and unit tests to cover the changes

* Add regression algos

* Simplifiy SetAccountCurrency implementation

* Minor changes

* Minor changes

Add SetAccountCurrency() override (QuantConnect#7284)

* Add SetAccountCurrency overload

- Add SetAccountCurrencyOverload to allow the user to set also account
  currency quantity
- Add regression and unit tests to cover the changes

* Add regression algos

* Simplifiy SetAccountCurrency implementation

* Minor changes

* Minor changes

Update readme.md

Add missing MHDB 'holidays' entry for backwards compatibility (QuantC…

…onnect#7287)

Fix position group `HasSufficientBuyingPowerForOrder` (QuantConnect#7285

)

* Fix position group HasSufficientBuyingPowerForOrder

Comparing computed delta BP -- which already considers every impacted
group -- with the right available buying power (the remaining margin)

* Minor changes

Python history improvements (QuantConnect#7283)

* Pandas frame include all ticks

- Pandas data framde history response will include all ticks. Updating
  existing and adding new tests

* Python pandas converter performance improvement

Add naked single-option strategies (QuantConnect#7231)

* Handle liquidating option position with an option strategy

* Handle liquidating option position with an option strategy

* Minor changes

* Minor fix in default margin model margin call order generation

Add naked single-option strategies (QuantConnect#7231)

* Handle liquidating option position with an option strategy

* Handle liquidating option position with an option strategy

* Minor changes

* Minor fix in default margin model margin call order generation

Update readme.md

Update readme.md