Refactor AboutCmdletVerbs

[vexx32]

PR Summary

Quick pass over AboutCmdletVerbs to tidy it up a bit, get it in line with the rest of the introductory topics.

Changes

• Constrain block comment widths a bit to make it a bit easier to read (hopefully).
• Tidy code a bit.
• Rephrase / adjust commentary where needed.

Checklist

• Pull Request has a meaningful title.
• Summarised changes.
• Pull Request is ready to merge & is not WIP.
• Added tests / only testable interactively.
  • Make sure you add a new test if old tests do not effectively test the code changed.
• Added documentation / opened issue to track adding documentation at a later date.

[steviecoaster]

I only marked a few spots here. There are a couple more, but was getting repetitive

[Maamue]

I would like to suggest to use different examples than Office 365, not everyone will have to interact with Exchange and will never see these Cmdlets, or at least give an eample additional exmaple cmdlet to the Exchange calendar cmdlets. Focus is on th verbs so the noun should be agnostic, I still think it may help readers in their learning process.

Otherwise I spotted some typos here and there.

[vexx32]

@Maamue I agree the office 365 isn't the most applicable example for everyone. The "generic" example, so to speak, is the *-Item / *-Content cmdlets, which I've gone through and added as a series of practical exercises, taking the place of the extra commentary.

Is there a better / more applicable secondary example than office 365 cmdlets for this purpose, do you think? Perhaps we'd be better off varying the examples rather than using examples all from the same module?