feat: add corner rounding parameter so we can make square cards (#845)

* add corner rounding parameter so i can make square cards

* rename rx to border_radius

tests/renderStatsCard.test.js

@@ -262,4 +262,11 @@ describe("Test renderStatsCard", () => {
       ).textContent,
     ).toBe("参与项目数:");
   });
+
+  it("should render without rounding", () => {
+    document.body.innerHTML = renderStatsCard(stats, { border_radius: "0" });
+    expect(document.querySelector("rect")).toHaveAttribute("rx", "0");
+    document.body.innerHTML = renderStatsCard(stats, { });
+    expect(document.querySelector("rect")).toHaveAttribute("rx", "4.5");
+  });
 });