* Add ro and ro-md languages
This commit adds the infrastructure needed to add Romanian translations.
The json translations are not yet translated. They will be updated in future commits as the translation progresses.
* Add missing ro property
Phase 7: Create documentation
- Create PLUGIN_I18N.md with complete i18n guide
- Quick start guide with file structure
- Manifest configuration details
- Translation file format and best practices
- Complete API documentation (translate, formatDate, getCurrentLanguage)
- Language change hook documentation
- Full list of supported languages (24 languages)
- Complete working example with multi-language support
- Best practices and troubleshooting sections
- Migration guide from hard-coded strings
- Testing and performance considerations
- Update README.md with i18n section
- Add i18n API methods to Plugin API section
- Add languageChange hook to hooks list
- Add i18n example to usage section
- Add i18n files to optional files list
- Add i18n best practice
- Link to comprehensive PLUGIN_I18N.md guide
Documentation provides complete guide for plugin developers to add
multi-language support to their plugins with working examples.