Prepare WebGPU package releases

[joesobo]

Summary

• run the Changesets version step for the merged WebGPU renderer changes
• publish Plugin API runtime protocol 3 consistently across Core, Extension, docs, examples, and all bundled plugin manifests
• reject old Plugin API 2 plugins without aborting workspace startup, while preserving a warning
• fix Mutation Seed's Vitest-compatible child_process mocks and repository-root fixtures
• block release:publish while unversioned changesets remain
• split every newly touched test/fixture over 300 lines by behavior

Release versions

• Extension 5.13.0
• Graph renderer 0.1.0
• Plugin API 6.0.0
• Core 2.0.0
• Godot 2.3.2
• Markdown 1.1.9
• Particles 0.2.3
• Svelte 0.2.5
• TypeScript 2.2.6
• Unity 0.2.4
• Vue 0.3.5
• MCP 2.2.8

Validation

• package unit tests: 12/12 tasks; Core 1,158 tests
• Extension node: 3,133 tests
• Extension webview graph: 1,312 tests
• Extension webview app/plugins: 586 tests
• Extension webview panels/export: 799 tests
• mutation-compatible Extension dry run: 3,133 tests
• typecheck: 13/13 tasks
• lint: 13/13 tasks
• build: 15/15 tasks
• release contracts: 28/28 tests
• no changed test or fixture exceeds 300 lines
• git diff --check: clean

No Playwright tests were run locally.

Release note

The earlier all-packages workflow run completed successfully but only published @codegraphy-dev/graph-renderer@0.0.0; existing npm and VSIX versions were skipped because Changesets had not yet updated package versions. Merge this PR before dispatching Release with target=all again.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 72bd5e0

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