Based on standard practices, we need to have a copyright and license notice at the top of each source file. Removed existing copyrights and updated/added copyright notices for .h, .cpp, .cs, .ps1, and .psm1 files.
Updated module manifests for consistency to have Author = "PowerShell" and Company = "Microsoft Corporation". Removed multiple line breaks.
Separate PR coming to update contribution document for new source files: #6140
Manually reviewed each change.
Fix#6073
* Add Gzip and Deflate Support to WebListener
* [Feature] Run Feature tests
* [Feature] Address PR Feedback
* [Feature] Re-Run CI
* [feature] Update WebListener Index page
* [Feature] Run Feature tests
* [Feature] Re-run CI
