This fixes spelling failures in CI. It appears to be caused by a change in the tool used to test spelling
This change:
-Updates the dictionary for new and words which are detected differently
-updates markdown where it is more appropriate
-adds one file to the markdown tests.
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
