Acceptance tests: basic Graph View and language examples

[joesobo]

Summary

Starts the first acceptance-test split for Trello card https://trello.com/c/7tFwbgvT/171-acceptance-tests-basic-graph-view-and-language-examples.

This PR is intentionally opened before implementation so the human can add rough informal specifications first, following the staged acceptance workflow:

1. Human writes rough specs.
2. Agent converts them into harder subdivided tasks.
3. Human reviews tasks.
4. Agent converts reviewed tasks into Gherkin-ish Markdown.
5. Human spot-checks Gherkin.
6. Agent implements bindings/tests/code to pass the accepted specs.

Current State

• Adds a kickoff plan file documenting scope and workflow.
• Does not create or edit human-owned acceptance spec Markdown yet.

Verification

Not run: docs-only kickoff commit.

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Latest commit: 437001e

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