- Rename the Ukrainian locale identifier from ua-UA/ua to uk-UA,
with uk kept as a short alias
- Update directory (docs/ua-UA -> docs/uk-UA), README links, and
all component/module IDs accordingly
- Add locale:uk-ua entry to install-components.json, replacing the
orphaned locale:ua entry that had no matching component
- Add docs-uk-ua entry to install-modules.json, pointing to
docs/uk-UA
Fixes "Unknown install component" error triggered by the previous
locale:ua entry.