* WIP: Refactor Correlation Indicator
* Simplified comparison logic and improved abstraction
* Refactor Correlation and Beta indicators
- Created a base class to handle indicators with dual-symbol
functionality.
- Refactored the Beta and Correlation indicators to inherit from the new
base class.
- Updated unit tests.
- Added a new regression test to validate the latest computed value.
* Addressed review comments
* Update regression test
* Add new unit test to CommonIndicatorTests
* Addressed new review comments
JosueNina