feat(python): generate an editable local starter

[jeremydixon22]

Summary

• add a non-overwriting vyral-runtime init command that generates one editable @vyral(...) application
• demonstrate receipt-before-dispatch, process close/reopen recovery, idempotent rerun, and explicit RUN_VERSION admission of changed work
• qualify wheel and sdist installation through both the generated starter and the connected local quickstart, with a five-minute first-use budget
• extend hosted platform evidence and public documentation for the local single-player path

Verification

• scripts/verify-python-runtime.sh (200 tests, coverage floor, strict mypy, wheel/sdist/server/clean-install verification)
• PYTHONPATH=runtimes/python/src python3 -m unittest runtimes/python/tests/test_starter.py runtimes/python/tests/test_host_cli.py
• python3 -m mypy --strict runtimes/python/src/vyral_runtime/_starter.py runtimes/python/src/vyral_runtime/host/cli.py scripts/verify-python-runtime-install.py scripts/write-python-runtime-platform-receipt.py scripts/verify-python-runtime-platform-matrix.py scripts/test-python-runtime-platform-matrix.py
• python3 scripts/test-python-runtime-platform-matrix.py
• scripts/verify-public-export.sh --allow-dirty
• python3 scripts/verify-markdown-links.py
• workflow YAML parse and git diff --check

Public-information declaration

Yes. This change is intentionally public, end-user-facing runtime code, documentation, tests, and qualification evidence. It adds no private planning discussion or credentials. It does not promote runtime/adapter maturity and does not authorize or perform package publication.