feat: Add prop autoFocus to set focus on the Excalidraw component (#3691)

* feat: Add prop autofocus to set focus on Excalidraw component

* Update PR number

* Make requested changes

* Add note

* Update src/packages/excalidraw/CHANGELOG.md

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

* Update src/tests/excalidrawPackage.test.tsx

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

* Remove duplicate sentence

* Indent note

* autofocus -> autoFocus

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/tests/packages/excalidraw.test.tsx

@@ -224,4 +224,22 @@ describe("<Excalidraw/>", () => {
       });
     });
   });
+
+  describe("Test autoFocus prop", () => {
+    it("should not focus when autoFocus is false", async () => {
+      const { container } = await render(<Excalidraw />);
+
+      expect(
+        container.querySelector(".excalidraw") === document.activeElement,
+      ).toBe(false);
+    });
+
+    it("should focus when autoFocus is true", async () => {
+      const { container } = await render(<Excalidraw autoFocus={true} />);
+
+      expect(
+        container.querySelector(".excalidraw") === document.activeElement,
+      ).toBe(true);
+    });
+  });
 });