Stock-indicators

New indicators:

- [Stochastic Momentum Indicator](https://daveskender.github.io/Stock.Indicators/indicators/Smi/#content) - 644
- [Volume Weighted Moving Average](https://daveskender.github.io/Stock.Indicators/indicators/Vwma/#content) - 658

:warning: Breaking changes:

- performance tuning - 652 (see notes)
General performance tuning makes the library about 2x faster.
Numerous results properties and a few input parameters were changed from `decimal` to `double` data types.

Special thanks to:

- myalgomate for recommending SMI
- Salardx for recommending VWMA

Updated indicators:

- add 3rd support/resistance level to Standard [Pivot Points](https://daveskender.github.io/Stock.Indicators/indicators/PivotPoints/#content) - 671

Special thanks to:

- myalgomate for contributing PP update
- Marcusbaker1 for your [patronage](https://github.com/sponsors/DaveSkender)

Updated indicators:

- parameterize [Alligator](https://daveskender.github.io/Stock.Indicators/indicators/Alligator/#content) (and corresponding Gator) - 662

Minor breaking change:

- `multiplier` parameter for [Chandelier Exit](https://daveskender.github.io/Stock.Indicators/indicators/Chandelier/#content) was changed from `decimal` to `double`

Chores:

- refactoring internal methods for handling Quote types, resulting in measurable [performance improvements](https://daveskender.github.io/Stock.Indicators/performance/)

Special thanks to:

- myalgomate for recommending Alligator parameterization

Bug fixed:

- ZigZag UnhandledException with small data sets - 632

Special thanks to:

- Fredrik-C for reporting and providing clear information and historical quote data to reproduce the error.

Minor indicator updates:

- added more parameters to [Stochastic Oscillator](https://daveskender.github.io/Stock.Indicators/indicators/Stoch/#content) for customization of KDJ - 621
- added `initialFactor` parameter to [Parabolic SAR](https://daveskender.github.io/Stock.Indicators/indicators/ParabolicSar/#content) - 619
- added SMMA option for [Moving Average Envelopes](https://daveskender.github.io/Stock.Indicators/indicators/MaEnvelopes/#content) - 617

Minor bugs fixed:

- improper lines when ZigZag has not met the threshold - 618
- special exception to Parabolic SAR values during reversal - 620

Special thanks to:

- kokazani for encouraging added KDJ customization
- Salardx for providing data for ZigZag that uncovered an unusual error case
- overstartup for recommending `initialFactor` for Parabolic SAR

Modified indicators:

- add Beta+/Beta- to [Beta](https://daveskender.github.io/Stock.Indicators/indicators/Beta/#content) - 597
- add slow and fast EMA to [MACD](https://daveskender.github.io/Stock.Indicators/indicators/Macd/#content) results - 595

Modify supported frameworks:

- add .NET 6.0
- remove .NET Framework 4.6.1

Chores:

- add simple backtest [example code](https://daveskender.github.io/Stock.Indicators/examples/#content)

Special thanks to:

- GordonEldest for recommending Beta+/-
- sophisma for recommending EMA additions to MACD