Enhance RIDDL Documentation Diagrams

[reid-spencer]

This PR supports:

• A Diagrams Pass to pre-compute diagram content
• Various Diagram types to be used by Hugo pass

[github-actions]

Pull Request Test Coverage Report for Build 7233654219

• 127 of 259 (49.03%) changed or added relevant lines in 18 files are covered.
• 133 unchanged lines in 46 files lost coverage.
• Overall coverage decreased (-0.6%) to 59.746%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
diagrams/src/main/scala/com/ossuminc/riddl/diagrams/mermaid/UseCaseDiagramSupport.scala	1	2	50.0%
hugo/src/main/scala/com/ossuminc/riddl/hugo/MessagesPass.scala	6	7	85.71%
language/src/main/scala/com/ossuminc/riddl/language/parsing/StreamingParser.scala	0	1	0.0%
hugo/src/main/scala/com/ossuminc/riddl/hugo/HugoCommand.scala	1	3	33.33%
language/src/main/scala/com/ossuminc/riddl/language/parsing/RiddlOptions.scala	0	2	0.0%
passes/src/main/scala/com/ossuminc/riddl/passes/resolve/ReferenceMap.scala	0	2	0.0%
passes/src/main/scala/com/ossuminc/riddl/passes/validate/ValidationPass.scala	8	10	80.0%
hugo/src/main/scala/com/ossuminc/riddl/hugo/ToDoListPass.scala	14	17	82.35%
hugo/src/main/scala/com/ossuminc/riddl/hugo/MarkdownWriter.scala	15	19	78.95%
diagrams/src/main/scala/com/ossuminc/riddl/diagrams/mermaid/UseCaseDiagram.scala	7	18	38.89%

Files with Coverage Reduction	New Missed Lines	%
commands/src/main/scala/com/ossuminc/riddl/commands/OnChangeCommand.scala	1	27.18%
commands/src/main/scala/com/ossuminc/riddl/commands/PassCommand.scala	1	65.63%
diagrams/src/main/scala/com/ossuminc/riddl/diagrams/mermaid/EntityRelationshipDiagram.scala	1	6.67%
language/src/main/scala/com/ossuminc/riddl/language/AST.scala	1	59.46%
language/src/main/scala/com/ossuminc/riddl/language/parsing/EntityParser.scala	1	77.78%
language/src/main/scala/com/ossuminc/riddl/language/parsing/FunctionParser.scala	1	67.86%
language/src/main/scala/com/ossuminc/riddl/language/parsing/NoWhiteSpaceParsers.scala	1	55.56%
language/src/main/scala/com/ossuminc/riddl/language/parsing/ProjectorParser.scala	1	75.0%
language/src/main/scala/com/ossuminc/riddl/language/parsing/Readability.scala	1	77.27%
language/src/main/scala/com/ossuminc/riddl/language/parsing/RiddlOptions.scala	1	15.63%

Totals
Change from base Build 7233650214:	-0.6%
Covered Lines:	4567
Relevant Lines:	7644

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💛 - Coveralls