feat module 1,2,4 : slow the transition for child submenu

src/components/Navbar/Navbar.jsx

                               clipPath: "polygon(0 0, 100% 0, 100% 100%, 0 100%)",
                               overflow: "hidden",
                               willChange: "clip-path",
-                              animation: "childCardReveal .45s ease-in-out",
+                              animation: "childCardReveal .70s ease-in-out",
                               "@keyframes childCardReveal": {
                                 "0%": {
                                   clipPath: "polygon(0 0, 0 0, 0 100%, 0 100%)",