feat: rename the database from Settings, keeping all config

Adds a Rename button to Settings -> Database: renames the current SQLite database
(e.g. opslog.db -> F4BPO.db) while preserving every setting/profile, unlike New
database which starts empty. Implemented as a VACUUM INTO copy + pointer switch;
the old file (open and locked now) is scheduled via config.json delete_pending
and removed, with its -wal/-shm sidecars, on the next launch.

frontend/wailsjs/go/main/App.js

@@ -1314,6 +1314,10 @@ export function RemovePassphrase(arg1) {
   return window['go']['main']['App']['RemovePassphrase'](arg1);
 }
 
+export function RenameDatabase(arg1) {
+  return window['go']['main']['App']['RenameDatabase'](arg1);
+}
+
 export function RenderEQSL(arg1, arg2) {
   return window['go']['main']['App']['RenderEQSL'](arg1, arg2);
 }