feat: add new spinner component

apps/desktop2/src/app.css

@@ -60,3 +60,63 @@ input::-ms-clear {
 ::-webkit-input-placeholder {
   line-height: normal;
 }
+
+.spinner-leaf {
+  position: absolute;
+  top: 0;
+  left: calc(50% - 12.5% / 2);
+  width: 12.5%;
+  height: 100%;
+  animation: spinner-leaf-fade 800ms linear infinite;
+
+  &::before {
+    content: "";
+    display: block;
+    width: 100%;
+    height: 30%;
+    background-color: currentColor;
+    @apply rounded;
+  }
+
+  &:where(:nth-child(1)) {
+    transform: rotate(0deg);
+    animation-delay: -800ms;
+  }
+  &:where(:nth-child(2)) {
+    transform: rotate(45deg);
+    animation-delay: -700ms;
+  }
+  &:where(:nth-child(3)) {
+    transform: rotate(90deg);
+    animation-delay: -600ms;
+  }
+  &:where(:nth-child(4)) {
+    transform: rotate(135deg);
+    animation-delay: -500ms;
+  }
+  &:where(:nth-child(5)) {
+    transform: rotate(180deg);
+    animation-delay: -400ms;
+  }
+  &:where(:nth-child(6)) {
+    transform: rotate(225deg);
+    animation-delay: -300ms;
+  }
+  &:where(:nth-child(7)) {
+    transform: rotate(270deg);
+    animation-delay: -200ms;
+  }
+  &:where(:nth-child(8)) {
+    transform: rotate(315deg);
+    animation-delay: -100ms;
+  }
+}
+
+@keyframes spinner-leaf-fade {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0.25;
+  }
+}