feat(server): introduce admin reset functionality and enhance user management

- Added a new `reset-admin` script to reset or create the admin username and password.
- Updated the README to include instructions for resetting the admin login.
- Enhanced user management by allowing username updates during admin reset.
- Defaulted new resources to the internal namespace `local` for better organization.
- Removed unused owner selection from various components to streamline the UI.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/web/src/pages/WorkflowTrashPage.jsx

@@ -61,7 +61,6 @@ export function WorkflowTrashPage() {
               <tr>
                 <th>Name</th>
                 <th>File</th>
-                <th>Owner</th>
                 <th>Deleted</th>
                 <th>Age</th>
                 <th>Purge in</th>
@@ -73,7 +72,6 @@ export function WorkflowTrashPage() {
                 <tr key={item.id} className="hover">
                   <td>{item.name ?? "—"}</td>
                   <td className="font-mono text-xs">{item.file}</td>
-                  <td className="font-mono text-xs">{item.owner}</td>
                   <td className="whitespace-nowrap">{formatTime(item.deleted_at)}</td>
                   <td>{formatAge(item.age_ms)}</td>
                   <td>