feat: sharpness (#1931)

* feat: sharpness

* feat: fill sharp lines, et al.

* fix: rotated positioning

* chore: simplify path with Q

* fix: hit test inside sharp elements

* make sharp / round buttons work properly

* fix tsc tests

* update snapshots

* update snapshots

* fix: sharp arrow creation error

* fix merge and test

* avoid type assertion

* remove duplicate helper

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

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

@@ -29,6 +29,7 @@ Object {
   "seed": 337897,
   "startBinding": null,
   "strokeColor": "#000000",
+  "strokeSharpness": "round",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "arrow",
@@ -56,6 +57,7 @@ Object {
   "roughness": 1,
   "seed": 337897,
   "strokeColor": "#000000",
+  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "diamond",
@@ -83,6 +85,7 @@ Object {
   "roughness": 1,
   "seed": 337897,
   "strokeColor": "#000000",
+  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "ellipse",
@@ -121,6 +124,7 @@ Object {
   "seed": 337897,
   "startBinding": null,
   "strokeColor": "#000000",
+  "strokeSharpness": "round",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "line",
@@ -148,6 +152,7 @@ Object {
   "roughness": 1,
   "seed": 337897,
   "strokeColor": "#000000",
+  "strokeSharpness": "sharp",
   "strokeStyle": "solid",
   "strokeWidth": 1,
   "type": "rectangle",