chore: add cspell config and fix spelling errors #126

Job	Run time
Continuous Integration / Run Tests (ubuntu-latest)	47s
Continuous Integration / Run Tests (windows-latest)	1m 59s
Continuous Integration / Run Tests (PowerShell 5.1)	3m 14s
Continuous Integration / Run Tests (macOS-latest)	50s
Continuous Integration / Run Linters	17s
Continuous Integration / Publish Unit Tests Results	12s
	7m 19s

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