Refactor web build process and update documentation

- Removed Node.js build artifacts from .gitignore and adjusted Makefile to reflect changes in web UI build process, now using server-rendered Go templates instead of React.
- Updated README to clarify the new web UI architecture and output formats, emphasizing the removal of the Node.js build step.
- Added a command to set the number of frames per render task in manager configuration, enhancing user control over rendering settings.
- Improved Gitea workflow by removing unnecessary npm install step, streamlining the CI process.

web/templates/partials/admin_users.html

@@ -0,0 +1,44 @@
+{{ define "partial_admin_users" }}
+{{ $users := index . "users" }}
+{{ $currentUserID := index . "current_user_id" }}
+{{ if not $users }}
+<p>No users found.</p>
+{{ else }}
+<table class="table">
+  <thead>
+    <tr>
+      <th>ID</th>
+      <th>Name</th>
+      <th>Email</th>
+      <th>Provider</th>
+      <th>Admin</th>
+      <th>Created</th>
+      <th>Actions</th>
+    </tr>
+  </thead>
+  <tbody>
+  {{ range $user := $users }}
+    <tr>
+      <td>{{ $user.ID }}</td>
+      <td>{{ $user.Name }}</td>
+      <td>{{ $user.Email }}</td>
+      <td>{{ if $user.OAuthProvider }}{{ $user.OAuthProvider }}{{ else }}local{{ end }}</td>
+      <td>{{ if $user.IsAdmin }}yes{{ else }}no{{ end }}</td>
+      <td>{{ formatTime $user.CreatedAt }}</td>
+      <td class="row">
+        {{ if and $user.IsAdmin (eq $user.ID $currentUserID) }}
+        <button class="btn tiny" disabled title="You cannot revoke your own admin status">
+          Revoke Admin
+        </button>
+        {{ else }}
+        <button class="btn tiny" data-set-admin="{{ $user.ID }}" data-admin-value="{{ if $user.IsAdmin }}false{{ else }}true{{ end }}">
+          {{ if $user.IsAdmin }}Revoke Admin{{ else }}Make Admin{{ end }}
+        </button>
+        {{ end }}
+      </td>
+    </tr>
+  {{ end }}
+  </tbody>
+</table>
+{{ end }}
+{{ end }}