Option Delta Indicator

[LouisSzeto]

Description

Add Option Delta indicator for Option securities

Related Issue

closes #7667
related to #7611

Motivation and Context

Requested feature

Requires Documentation Change

Add section in Writing Algorithm - Indicator

How Has This Been Tested?

Added unit tests and compared to IB & QuantLib data

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which improves implementation)
• Performance (non-breaking change which improves performance. Please add associated performance test and results)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Non-functional change (xml comments/documentation/etc)

Checklist:

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My branch follows the naming convention bug-<issue#>-<description> or feature-<issue#>-<description>

[Martin-Molinero]

Nice! Leaving minor comments 👍

[Martin-Molinero]

Thank you 👍 shared minor comments in slack