Fix spelling and typos in docs, code variables and code comments

[chocnut]

No feature fixes etc. These are spelling and typo fixes in the docs and other code comment that I found.

Spelling and Typo fixes

• Write and run all tests
• Write documentation
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[codecov-io]

Codecov Report

Merging #6986 into master will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff           @@
##           master    #6986   +/-   ##
=======================================
  Coverage   88.43%   88.43%           
=======================================
  Files         229      229           
  Lines        8420     8420           
=======================================
  Hits         7446     7446           
  Misses        974      974

Impacted Files	Coverage Δ
lib/plugins/package/lib/packageService.js	87.5% <ø> (ø)	⬆️
lib/classes/CLI.js	95.72% <ø> (ø)	⬆️
lib/utils/log/fileLog.js	0% <ø> (ø)	⬆️
lib/classes/PluginManager.js	96.67% <ø> (ø)	⬆️
lib/plugins/install/install.js	100% <ø> (ø)	⬆️
lib/plugins/aws/deploy/lib/checkForChanges.js	98.19% <ø> (ø)	⬆️
lib/classes/Variables.js	100% <ø> (ø)	⬆️
lib/plugins/aws/provider/awsProvider.js	90.75% <ø> (ø)	⬆️
lib/plugins/aws/package/compile/functions/index.js	96.59% <66.66%> (ø)	⬆️

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[medikoo]

Looks great! Thank you @chocnut !