DecisionTable to mermaid

[ahouseholder]

• resolves Create mermaid diagram generator for use with DecisionTableobjects #869
• resolves Replace supplier tree pdf with mermaid diagram #458
• resolves Replace deployer tree pdf with mermaid diagram #459
• resolves Consider mermaid flowchart IR developed by Vulnetix for graphic display of output #862
• supersedes DecisionTable to Mermaid diagrams #884 (this PR resubmitting from a main repo branch)

This PR adds tools to generate a mermaid diagram from a DecisionTable object.
It also adds a method that lets us generate the markdown table format directly from the DecisionTable object instead
of loading a .csv file.

The main changes can be found in src/ssvc/decision_tables/helpers.py. Everything else is incidental.

Note

mermaid has a default limit of 500 edges per diagram to prevent unreasonably long browser load times. In this implementation, we first attempt to generate a single diagram. If the edge count exceeds the limit, we split it across the first decision point values (each one gets its own diagram). So far this is sufficient for all the decisions we currently have models for. If we need a more robust solution later, we can address this in a future PR.

Incidental changes

• Update the COORDINATE decision point to better reflect existing documentation.
• Update existing decision model docs to leverage new features available from DecisionTable implementation.

Copilot Summary

This pull request updates the SSVC "Decline, Track, Coordinate" outcome group to version 1.0.1 and ensures that all relevant references in the coordinator_triage_1_0_0.json decision table use the new version. The new version provides more descriptive explanations for each outcome, improving clarity and consistency across the data.

Key changes:

Outcome group update and improved descriptions:

• Added a new file decline_track_coordinate_1_0_1.json defining the "Decline, Track, Coordinate" group with detailed descriptions for each value, clarifying what each outcome means.
• Updated the outcome group reference in coordinator_triage_1_0_0.json from version 1.0.0 to 1.0.1, and replaced the brief descriptions with the improved ones from the new version.

Decision table consistency:

• Updated all mapping entries in coordinator_triage_1_0_0.json to reference ssvc:COORDINATE:1.0.1 instead of the old version, ensuring the decision table consistently uses the new outcome group. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37]

[j---]

I'm not familiar with the mermaid implementation, so I can't really review the code, but given that the test works, it LGTM