Spelling and whitespace fixes

[SamErde]

A little bit of polish for Maester:

• Add cSpell settings with project word list and ignored words
• Import cSpell dictionaries for PowerShell and C# projects
• Fix multiple typos
• Remove trailing whitespace and lines that only contain extraneous whitespace

[merill]

Awesome. Thanks @SamErde

for future reference the EIDCSA.ps1 files are auto generated so any changes will be overwritten when we run the script in ./build

[SamErde]

Ah, thanks for the reminder! I would like to know more about how that part of the build works. I have also been curious about why they're in a different folder structure than the other tests.