feat: add life codex remote console

[mcoder2014]

Summary

• Add life_codex_server and life_codex_agent for remote Codex CLI control.
• Add shared Go state/protocol/audit/attachment/Codex app-server adapter package.
• Add React/Vite web console for machine binding, multi-session chat, BTW/Fork, image paste, skill selection, queues, and audit cleanup.
• Add sample configs, install/build integration, and documentation.

Verification

• go test ./...
• ./build.sh
• npm --prefix web/life_codex run build
• ./install.sh --tool life_codex_server --tool life_codex_agent --prefix /private/tmp/life_codex_install --config-dir /private/tmp/life_codex_install_config
• Local loopback e2e under /private/tmp/life_codex_e2e with real codex app-server, including multi-turn, parallel sessions, fork, image reading, and Chrome UI interaction.

Notes

• Local Codex needed SSL_CERT_FILE=/etc/ssl/cert.pem in the e2e agent environment on this machine.
• Chrome e2e screenshots are stored locally under /private/tmp/life_codex_e2e/chrome-*.png.