Feature: add title option

[HandyS11]

No description provided.

[Copilot]

Pull request overview

Adds an includeTitle option across Mermaid renderers and exposes it via both the CLI and MCP tool APIs, allowing callers to suppress the Mermaid title/frontmatter header (and CLI non-mermaid header rendering).

Changes:

• Add IncludeTitle support to Mermaid graph/ERD/class renderers (and base solution graph console renderer).
• Expose includeTitle as an optional parameter on MCP tools and --title option in CLI commands.
• Extend unit/contract tests and update docs/specs to reflect the new option.

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
tests/ProjGraph.Tests.Unit.ProjectGraph/MermaidGraphRendererTests.cs	Adds coverage for disabling Mermaid title output.
tests/ProjGraph.Tests.Unit.EntityFramework/MermaidErdRendererTests.cs	Adds coverage for enabling/disabling ERD Mermaid title output.
tests/ProjGraph.Tests.Unit.ClassDiagram/MermaidClassDiagramRendererTests.cs	Adds coverage for enabling/disabling class diagram Mermaid title output.
tests/ProjGraph.Tests.Contract/McpErdContractTests.cs	Updates tool contract to require new includeTitle optional parameter.
tests/ProjGraph.Tests.Contract/McpContractTests.cs	Adds tool-count assertion and updates graph tool parameter contract for includeTitle.
tests/ProjGraph.Tests.Contract/McpClassDiagramTests.cs	Updates class diagram tool contract to require includeTitle optional parameter.
src/ProjGraph.Mcp/README.md	Documents new includeTitle parameter for MCP tools.
src/ProjGraph.Mcp/Program.cs	Adds includeTitle parameters and wires them to renderers.
src/ProjGraph.Lib.ProjectGraph/Rendering/SolutionGraphRendererBase.cs	Adds IncludeTitle to suppress console header rule.
src/ProjGraph.Lib.ProjectGraph/Rendering/MermaidGraphRenderer.cs	Adds IncludeTitle to suppress Mermaid frontmatter/title.
src/ProjGraph.Lib.EntityFramework/Rendering/MermaidErdRenderer.cs	Adds IncludeTitle to suppress Mermaid frontmatter/title.
src/ProjGraph.Lib.ClassDiagram/Rendering/MermaidClassDiagramRenderer.cs	Adds IncludeTitle to suppress Mermaid frontmatter/title.
src/ProjGraph.Cli/README.md	Documents --title usage and settings across commands.
src/ProjGraph.Cli/Commands/VisualizeCommand.cs	Adds --title option and threads it into renderer selection.
src/ProjGraph.Cli/Commands/ErdCommand.cs	Adds --title option and threads it into the Mermaid ERD renderer.
src/ProjGraph.Cli/Commands/ClassDiagramCommand.cs	Adds --title option and threads it into the Mermaid class renderer.
specs/003-mermaid-class-diagram/spec.md	Adds includeTitle parameter to spec.
specs/002-dbcontext-erd/spec.md	Adds includeTitle parameter to spec.
specs/001-cli-graph-rendering/spec.md	Adds includeTitle parameter to spec.
samples/visualize/simple-dependencies/README.md	Adjusts code-fence language for sample output block.
README.md	Adds example for generating Mermaid without title header.

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[HandyS11]

@copilot review the PR

[Copilot]

@HandyS11 I've opened a new pull request, #23, to work on those changes. Once the pull request is ready, I'll request review from you.