[refactor / translation] lightning plugin language

[MichaelWheeley]

What does this PR do?

Refactored lightning plugin (useLightning.js) to add language formatting from react-i18next lookup.

• Additional keys in all languages, copied 'en' version as master, updated new keys in 'th' version but not other languages.
• Previously displayed both imperial and metric, now uses allUnits distance key to display one or the other.
• Converted use of 'm' for minute to 'min' ('m' has international meaning of metre).
• Removed auto-pluralization # strike(s), this does not translate well into other languages, replaced with 'Strikes detected: #'.
• Replaced 'Time:' with 'Age:', eliminated use of word 'ago', does not translate well into other languages.
• Reformatted unscientific unnecessary extra spacing on variables.
• note, some languages have specific words for 'min', 'km' and 'mile' however the English names are probably fine.
• note, on language change the titles of the lightning windows do not update as they are only loaded on start-up, it is necessary to F5 refresh to update them with the new language.

Type of change

• Bug fix
• New feature
• Performance improvement
• Refactor / code cleanup
• Documentation
• Translation
• Map layer plugin

How to test

1. from settings enable lightning plugin
2. choose English or any other language, Thai is complete for lightning keys

Checklist

• App loads without console errors
• Tested in Dark, Light, and Retro themes
• Responsive at different screen sizes (desktop + mobile)
• If touching server.js: caches have TTLs and size caps (we serve 2,000+ concurrent users)
• If adding an API route: includes caching and error handling
• If adding a panel: wired into Modern, Classic, and Dockable layouts
• No hardcoded colors — uses CSS variables (var(--accent-cyan), etc.)
• No .bak, .old, console.log debug lines, or test scripts included

Screenshots (if visual change)