Initial commit: Codex Launcher — Any AI Provider

Multi-provider integration for OpenAI Codex CLI/Desktop.

- Translation proxy: Responses API ↔ Chat Completions / Anthropic Messages
- GTK launcher with endpoint management, provider presets, Desktop/CLI launch
- Codex Default mode (built-in OAuth, zero config)
- Browser UA injection for Cloudflare-protected providers
- Streaming SSE, tool calls, reasoning content support
- Profile backup/import, model auto-fetch, bulk import
- Zero pip dependencies (pure Python stdlib + GTK)

src/codex-launcher.desktop.template

@@ -0,0 +1,10 @@
+[Desktop Entry]
+Type=Application
+Name=Codex Launcher
+Comment=Launch Codex Desktop with any AI provider
+Exec=/home/YOUR_USERNAME/.local/bin/codex-launcher-gui
+Icon=/opt/codex-desktop/resources/app.asar.unpacked/images/icon.png
+Terminal=false
+StartupNotify=true
+Categories=Development;IDE;
+Keywords=ai;coding;launcher;