feat(apm): add APM spotlight and learning references

[jonmagic]

Summary

• add APM coverage to the site while keeping AI primitives as the primary homepage story
• replace the original full-width homepage spotlight with a compact hero callout and a dedicated /apm page
• extend navigation, generated llms docs, and e2e coverage to include the new APM page and flow

What Changed

• homepage: remove the standalone APM section so primitives stay first, then add a lighter hero-level APM teaser
• apm page: add a dedicated guide covering what APM is, why it matters, how it relates to primitives, and when to use it
• docs/tests: regenerate llms.txt + llms-full.txt, generate apm.md, and add navigation/accessibility coverage for /apm

Testing

• bun run lint
• bun run typecheck
• bun run build
• bun run test

[Copilot]

Pull request overview

Adds first-class Agent Package Manager (APM) coverage to the static site while keeping AI primitives as the primary homepage story, and extends generated LLM docs + e2e coverage accordingly.

Changes:

• Adds a dedicated /apm page (new Vite multi-page entry + new Preact page/component + APM tutorial data).
• Updates homepage hero/navigation to surface APM as a top-level destination.
• Regenerates LLM-facing docs (llms*.txt, apm.md) and expands Playwright navigation/accessibility coverage for the new page.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
site/vite.config.ts	Adds apm/index.html as a new multi-page build entry.
site/apm/index.html	New static entry HTML for the /apm/ page (SEO/meta + module entry).
site/src/pages/apm.tsx	New Preact entrypoint that renders ApmPage.
site/src/components/ApmPage/ApmPage.tsx	Implements the new APM guide page layout/content blocks.
site/src/data/apmTutorial.ts	Adds TOC items, code samples, and further-reading data for APM.
site/src/components/Navigation/Navigation.tsx	Adds APM as a top-level nav item.
site/src/components/Hero/Hero.tsx	Adds a compact hero callout linking to the APM guide.
site/src/data/pages.ts	Registers the APM page for LLM doc generation and renumbers parts.
.github/skills/generate-llms/scripts/generate-llms-full.ts	Extends LLM doc generation to import/include and emit apm.md + APM section in llms-full.txt.
site/tests/e2e/navigation.spec.ts	Adds nav visibility + navigation test coverage for /apm/ and mobile menu.
site/tests/e2e/accessibility.spec.ts	Adds Axe scan coverage for the /apm/ page.
site/tests/e2e/app.spec.ts	Updates homepage expectations to include the new “Explore APM” hero link.
site/tests/e2e/fileTree.spec.ts	Aligns copy-button assertion with the button’s accessible name.
site/src/data/skillsTutorial.ts + site/public/skills.md	Adds “Packaging and Distribution” section tying skills to APM.
site/src/data/mcpTutorial.ts + site/public/mcp.md	Adds APM to MCP further-reading references.
site/src/data/agentsTutorial.ts + site/public/agents.md	Adds APM to Agents further-reading references.
site/public/llms.txt / site/public/llms-full.txt / site/public/apm.md	Regenerated LLM documentation to include APM page and content.