OKX strategy research and live execution tooling

lxy 92b5acdee3 test: tighten okx client coverage		преди 3 месеца
okx_codex_trader	d5130891bf feat: add okx demo client and contract sizing	преди 3 месеца
tests	92b5acdee3 test: tighten okx client coverage	преди 3 месеца
README.md	3f94692dec chore: scaffold okx codex trader project	преди 3 месеца
pyproject.toml	3f94692dec chore: scaffold okx codex trader project	преди 3 месеца

okx-codex-trader

Minimal project skeleton for the OKX Codex Trader demo CLI.