Add AOXCHAIN-compatible Move toolkit structure with CLI, frontend, and examples

[aoxc]

Motivation

• Provide an AOXCON ↔ AOXCHAIN compatibility layer to make the Move repo easier to explore and extend, with an interactive local CLI, a simple frontpage, and multiple example contracts.
• Add a small bootstrap/test automation and a TypeScript SDK scaffold to accelerate developer onboarding and cross-stack integration.

Description

• Add an interactive Python CLI at cli/aoxchain_cli.py and documentation at cli/README.md that exposes sui move build/test, repo layout inspection, and example listing.
• Add a static frontpage at frontend/index.html as a lightweight project landing UI.
• Add four Move example contracts under examples/contracts/ (payment_channel_example.move, governance_example.move, nft_rental_example.move, oracle_guard_example.move) and adjust payment_channel_example.move imports to use sui::tx_context::{Self, TxContext}.
• Add scripts/bootstrap.sh to encapsulate sui build/test flow and a TypeScript SDK placeholder at sdk/ts/README.md, and extend the root README.md with an "AOXCON ↔ AOXCHAIN Uyum Katmanı" section.

Testing

• Ran python3 -m py_compile cli/aoxchain_cli.py, which succeeded.
• Ran a syntax check bash -n scripts/bootstrap.sh, which succeeded.
• Attempted sui move build, which failed in this environment because the sui binary is not installed.
• Attempted to capture a frontpage screenshot with Playwright, which failed due to the browser runner being unable to access repo files in the execution environment.

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Codex Task