Start the setup wizard blank and add a Run setup again button

The first-run seed no longer inserts the original vendor's name, address, contact
details, PAN or bank account; the wizard now starts empty and requires a name and
state. Settings > Data gets a Run setup again button that clears the onboarded flag.
Re-running the wizard keeps the active invoice series unless the prefix or padding
changes. The sample logo moves out of public/ so it no longer ships in the app.

src/views/AppSettings.tsx

@@ -440,7 +440,7 @@ export default function AppSettings({
       </section>
             </TabPanel>
             <TabPanel>
-              <DataBackupPanel />
+              <DataBackupPanel settings={settings} onRerunSetup={onSaved} />
             </TabPanel>
             <TabPanel>
               <ErpnextSettingsPanel active={tab === SETTINGS_TABS.findIndex((t) => t.id === "integrations")} />