feat: better default radius sizes for rectangles (#5553)

Co-authored-by: Ryan <diweihao@bytedance.com>
Co-authored-by: dwelle <luzar.david@gmail.com>

src/tests/__snapshots__/selection.test.tsx.snap

@@ -27,11 +27,13 @@ Object {
     ],
   ],
   "roughness": 1,
+  "roundness": Object {
+    "type": 2,
+  },
   "seed": 337897,
   "startArrowhead": null,
   "startBinding": null,
   "strokeColor": "#000000",
-  "strokeSharpness": "round",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "arrow",
@@ -71,11 +73,13 @@ Object {
     ],
   ],
   "roughness": 1,
+  "roundness": Object {
+    "type": 2,
+  },
   "seed": 337897,
   "startArrowhead": null,
   "startBinding": null,
   "strokeColor": "#000000",
-  "strokeSharpness": "round",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "line",
@@ -102,9 +106,11 @@ Object {
   "locked": false,
   "opacity": 100,
   "roughness": 1,
+  "roundness": Object {
+    "type": 2,
+  },
   "seed": 337897,
   "strokeColor": "#000000",
-  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "diamond",
@@ -131,9 +137,11 @@ Object {
   "locked": false,
   "opacity": 100,
   "roughness": 1,
+  "roundness": Object {
+    "type": 2,
+  },
   "seed": 337897,
   "strokeColor": "#000000",
-  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "ellipse",
@@ -160,9 +168,11 @@ Object {
   "locked": false,
   "opacity": 100,
   "roughness": 1,
+  "roundness": Object {
+    "type": 3,
+  },
   "seed": 337897,
   "strokeColor": "#000000",
-  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "rectangle",