WIP: Rewrite mark rule using SwiftSyntax

[jpsim]

Still needs work, especially the correction logic.

[SwiftLintBot]

	2 Warnings
:warning:	If this is a user-facing change, please include a CHANGELOG entry to credit yourself! You can find it at CHANGELOG.md.
:warning:	This PR may need tests.

	13 Messages
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:book:	Linting Realm with this PR took 1.2s vs 1.24s on master (3% faster)
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:book:	This PR fixed a violation in Sourcery: /SourceryTests/Stub/Performance-Code/Kiosk/Bid Fulfillment/ManualCreditCardInputViewModel.swift:19:5: warning: Mark Violation: MARK comment should be in valid format. e.g. '// MARK: …' or '// MARK: - …' (mark)

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* WIP: Rewrite mark rule using SwiftSyntax.  
  [jpsim](https://github.com/jpsim)
  [#issue_number](https://github.com/realm/SwiftLint/issues/issue_number)

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