feat(scenes): rich scene descriptions and control viewer window

Add TipTap editing in the editor and an Electron window on the control panel to read the current scene description.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/shared/ui/Controls.module.css

@@ -13,6 +13,12 @@
   opacity: 0.45;
 }
 
+.disabledTipHost {
+  display: inline-flex;
+  vertical-align: middle;
+  cursor: not-allowed;
+}
+
 .buttonPrimary {
   border: 1px solid var(--accent-border);
   background: var(--accent-fill-solid);