Add Drop method to DefaultCtx for closing connections

The Drop method allows closing connections without sending a response, improving control over connection handling. Also updated a test assertion to use StatusOK for improved readability and consistency.

ctx.go

@@ -1979,6 +1979,7 @@ func (c *DefaultCtx) setRoute(route *Route) {
 	c.route = route
 }
 
+// Drop closes the connection without sending a response.
 func (c *DefaultCtx) Drop() error {
 	//nolint:wrapcheck // This must not be wrapped
 	return c.RequestCtx().Conn().Close()

ctx_test.go

@@ -5872,7 +5872,7 @@ func Test_Ctx_Drop(t *testing.T) {
 	resp, err = app.Test(httptest.NewRequest(MethodGet, "/no-response", nil))
 	require.NoError(t, err)
 	require.NotNil(t, resp)
-	require.Equal(t, 200, resp.StatusCode)
+	require.Equal(t, StatusOK, resp.StatusCode)
 	require.Equal(t, "0", resp.Header.Get("Content-Length"))
 }