Assignment details

[mitchspano]

Add Assignment Inner Node Rendering and Mermaid Default

Overview

This PR introduces several improvements and fixes to the flow-lens project, focusing on enhanced assignment node rendering, improved diff visualization, and a default switch to Mermaid diagrams.

Key Changes

1. Assignment Node Inner Content

• Feature: Assignment nodes in UML diagrams now display their inner assignment operations.
• Implementation:
  • Added a getFlowAssignmentInnerNodes method to UmlGenerator to extract and render assignment items (e.g., var1 = Hello World, var2 AddItem Test Value).
  • Updated the test suite to verify correct rendering of assignment inner content for various assignment operators and value types.
  • Ensured assignment items are always treated as arrays via setAssignments in the flow parser.

2. Default Diagram Tool: Mermaid

• Change: The default diagram tool in the CLI and documentation is now Mermaid instead of Graphviz.
• Docs: Updated the README.md to reflect this change and provided new Mermaid-based diff examples.

3. Diff Visualization

• Update: Updated example diffs and screenshots (Diff_New.png, Diff_Old.png) to reflect the new Mermaid output and improved assignment node rendering.

4. Version Bump

• Change: Bumped the package version from 0.1.11 to 0.1.12 in deno.json.