Command to bring up extension's output window's channel

[mm-broadcom]

Added a command to easily bring up the extension's output channel in the output window. Previously the user needed to know that existed and where to go and find it accordingly.

How Has This Been Tested?

Compiled the extension, brought up the command palette and ran the code to test. It brought up the output window with the expected channel selected.

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings