#19817: Added Burmese i18n

## Introduction Hi maintainers, I’m Shaung, a full-stack developer who occasionally contributes to Laravel and filamentphp. I’d like to contribute Burmese localization support for OpenClaw docs and the Control UI. ## What This PR Does - Adds Burmese docs under `docs/my/**` across major sections (start, install, cli, channels, gateway, tools, reference, etc.). - Adds Burmese glossary entries in `docs/.i18n/glossary.my.json`. - Adds Burmese UI locale file: `ui/src/i18n/locales/my.ts`. - Wires Burmese into i18n types/loading: - `ui/src/i18n/lib/types.ts` (`Locale` now includes `my`) - `ui/src/i18n/lib/translate.ts` (`SUPPORTED_LOCALES` + lazy import for `my`) - `ui/src/i18n/locales/en.ts` (language label includes Burmese)