Fix #824 Add the AvoidSemicolonsAsLineTerminators rule to warn about lines ending with a semicolon

[tempora-mutantur]

It's a rule to warn about lines ending with a semicolon

PR Summary

Add the PSAvoidSemicolonsAsLineTerminators rule to warn about lines ending with a semicolon. Covered with tests. The rule is disabled by default as it's more of a styling preference. #824

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
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[ghost]

All CLA requirements met.