feat: add boolean yams type

packages/ra-cubicweb/src/Schema.ts

@@ -3,6 +3,7 @@
   Date: () => ({ type: "Date" } as const),
   Float: () => ({ type: "Float" } as const),
   Int: () => ({ type: "Int" } as const),
+  Boolean: () => ({ type: "Boolean" } as const),
 } as const;
 
 export type BuildObj = ReturnType<typeof yams[keyof typeof yams]>;