Add auto ceilings and simplify ceiling selection affordances

packages/core/src/schema/nodes/ceiling.ts

@@ -13,11 +13,13 @@ export const CeilingNode = BaseNode.extend({
   polygon: z.array(z.tuple([z.number(), z.number()])),
   holes: z.array(z.array(z.tuple([z.number(), z.number()]))).default([]),
   height: z.number().default(2.5), // Height in meters
+  autoFromWalls: z.boolean().default(false),
 }).describe(
   dedent`
   Ceiling node - used to represent a ceiling in the building
   - polygon: array of [x, z] points defining the ceiling boundary
   - holes: array of polygons representing holes in the ceiling
+  - autoFromWalls: whether the ceiling is automatically generated from a closed wall loop
   `,
 )