Replace all inline references to the legacy upstream project with Lux KMS
branding (prose/labels), neutral identifiers (code), and neutral string
literals (frontend-internal cache keys, sentinels, masks), with every
reference renamed consistently so behavior is unchanged. Dead networking
UI (relay/gateway/pam) CLI examples now reference the Lux CLI.
Add a NOTICE file carrying the required upstream MIT attribution and full
permission notice — the only place the upstream name remains, as required
by that license.
No functional changes. Frontend (vite build) and Go backend
(go build -tags sqlite_fts5 sqlcipher) both build green.