refactor: rename elementType to activeTool and make it an object (#4968)

* refactor: rename elementType to activeTool

* update docs

* fix snap

* update activeToll to be an object and review fixes

* fix tests

* fix

src/tests/packages/__snapshots__/utils.test.ts.snap

@@ -2,6 +2,9 @@
 
 exports[`exportToSvg with default arguments 1`] = `
 Object {
+  "activeTool": Object {
+    "type": "selection",
+  },
   "collaborators": Map {},
   "currentChartType": "bar",
   "currentItemBackgroundColor": "transparent",
@@ -24,7 +27,6 @@ Object {
   "editingGroupId": null,
   "editingLinearElement": null,
   "elementLocked": false,
-  "elementType": "selection",
   "errorMessage": null,
   "exportBackground": true,
   "exportEmbedScene": false,