Fixes spelling errors

[jacobslusser]

See #1269 for some relevant discussion

List of changes

• Adds exclusion.dic file for spellchecker words to ignore
• Updates .editorconfig(s) to configure VS spellchecker for the library and unit test projects
• Fixes numerous misspelled words in comments, private members, and public members of test projects

NOTE: There is a misspelling of the ErrorOccured event in the Session class intentionally left unchanged because it is public-facing. Where we subscribe to that event via Session_ErrorOccurred, those instances are all private/internal and hence have been corrected.

Testing

All existing unit tests continue to pass.

Impact Analysis

None. No functional changes or public-facing APIs have been changed.

[Rob-Hague]

the file this is pointing to has only 2 words, both already included in the top-level file. Is it an artifact of earlier changes?

Suggested change

	spelling_exclusion_path = ../exclusion.dic
	spelling_exclusion_path = ../../exclusion.dic

[Rob-Hague]

this is the (redundant?) file I am talking about

[jacobslusser]

Another behavior (bug) in Visual Studio spellchecker. There were some times when it would honor the exclusion.dic file in the root and other times when it would only honor the one in the immediate same folder as the project/.editorconfig. From your fix, its possible I had my path wrong. Either way, I got tired of troubleshooting MS/VS issues and in the end tried to focus on the point of the PR which was to fix a few spelling errors, not necessarily build a spellchecking tool pipeline.

[Rob-Hague]

sure, thanks