Prepare public developer preview

[davidf9999]

Summary

• position 0.1.0 as a pre-1.0 developer preview
• document the downstream height-aware validation bug and release boundary
• explain CLI, Python, adapter, HTTP-service, CAD, and coding-agent integration patterns
• expand contribution, security, packaging, and release-readiness guidance
• test Python 3.10 through 3.14 and verify source/wheel distributions
• identify David Front as the MIT copyright holder

Verification

• 10 tests pass from the working checkout and a clean clone
• complete synthetic example validates and renders
• failing cooktop example is refused
• Python integration and runtime JSON Schema generation work
• wheel installs and exposes the CLI outside the checkout
• source archive contains the integration guide and complete synthetic example
• automated current-tree and Git-history privacy scans found no private project artifacts or common credential forms

Resolved decisions

• existing Git author name and email may be public; no history rewrite
• MIT holder: David Front

Required before merge/publication

• review the public-facing README, integration guide, and synthetic SVG

Do not merge or change repository visibility until that review is complete.