fix(troika-three-text): prevent copy() from sharing geometry between …

…instances

Mesh.copy copies a reference to the geometry, which is never what we
want for Text because each instance has its own specific attributes.
Sharing those geometry attributes can result in very weird bugs.

packages/troika-three-text/src/Text.js

@@ -650,7 +650,11 @@ const Text = /*#__PURE__*/(() => {
     }
 
     copy(source) {
+      // Prevent copying the geometry reference so we don't end up sharing attributes between instances
+      const geom = this.geometry
       super.copy(source)
+      this.geometry = geom
+
       COPYABLE_PROPS.forEach(prop => {
         this[prop] = source[prop]
       })