Add AOXCON↔AOXCHAIN integration scaffold: CLI, examples, frontend, scripts, docs, and .gitignore updates

[aoxc]

Motivation

• Provide a lightweight integration scaffold to prepare the repository for AOXCON ↔ AOXCHAIN Move development and testing.
• Make common developer workflows (build, test, manifest, examples) discoverable and scriptable via a small CLI and bootstrap script.
• Include example Move modules and a minimal frontend to speed onboarding and compatibility checks.

Description

• Add an interactive CLI cli/aoxchain_cli.py with subcommands build, test, manifest, and examples and a cli/README.md documenting usage.
• Add Move example modules under examples/contracts/ (governance_example.move, nft_rental_example.move, oracle_guard_example.move, payment_channel_example.move).
• Add a minimal frontpage frontend/index.html listing examples and quick-start commands.
• Add scripts/bootstrap.sh to run sui move build and sui move test as a local bootstrap/verification flow.
• Add integration guidance docs docs/INTEGRATION_COMPLETENESS_CHECKLIST.md and a short SDK placeholder sdk/ts/README.md, and extend README.md with repository layout and quick commands.
• Update .gitignore to exclude Python cache files by adding __pycache__/ and *.pyc.

Testing

• No automated tests were added or executed as part of this PR; the scaffold includes scripts/bootstrap.sh calling sui move build and sui move test for local verification.

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Codex Task