* Support OSC to set default background and foreground colors
* Update the Terminal theme when the background changes
* Fix whitespace per code-review
* Add Documentation Comments
Also fix a few outdated comments and whitespace
* Update Telemetry codes per code review
* Add Unit Tests for OSC ForegroundColor and BackgroundColor
* Add a couple additional test cases
* Minor doc and whitespace change per PR review
* Update comment help per code review
* Add another OSC 10 & 11 test case, improve output
* Comments and syntax cleanup per code reviews