refactor: Break apart monolithic configuration schema (#1977)

[skip ci]

src/config/schema/conditions/custom/camera.ts

@@ -0,0 +1,6 @@
+import { z } from 'zod';
+
+export const cameraConditionSchema = z.object({
+  condition: z.literal('camera'),
+  cameras: z.string().array().optional(),
+});