Node Enum Conversion (#3)

• Added CommonMarkAST
• Moved protocol conformance to unique files
• Minor updates
• Merged block line to ASTParsing
• Cleaned up tests
• Minor update
• Added break types
• Updated swiftlint formatting
• Adjusted enum for case blame
• Updated CommonMarkAST
• Added Block Quote and Paragraph
• Changed to avoid labels for commonmark enums
• Added html and code blocks
• Moved regex patters to properties for the time being
• Added emphasis
• Updated Image to Enum
• Added Text Enum Node Tests
• Added Strong
• Added link node
• Added List Node
• Updated document tests
• Final transition
• Renamed for new enum style
• Changed CommonMarkAST to Node
• Minor adjustments
• Updated dependencies
• Updated parsing