feat: 新增v-ripple指令(水波纹效果) (#956)

* feat: 新增v-ripple指令(水波纹效果)

* feat: 新增波纹demo

src/directives/ripple/index.scss

@@ -0,0 +1,48 @@
+/* stylelint-disable-next-line scss/dollar-variable-colon-space-after */
+$ripple-animation-transition-in:
+  transform 0.4s cubic-bezier(0, 0, 0.2, 1),
+  opacity 0.2s cubic-bezier(0, 0, 0.2, 1) !default;
+$ripple-animation-transition-out: opacity 0.5s cubic-bezier(0, 0, 0.2, 1) !default;
+$ripple-animation-visible-opacity: 0.25 !default;
+
+.v-ripple {
+  &__container {
+    position: absolute;
+    top: 0;
+    left: 0;
+    z-index: 0;
+    width: 100%;
+    height: 100%;
+    overflow: hidden;
+    pointer-events: none;
+    border-radius: inherit;
+    contain: strict;
+  }
+
+  &__animation {
+    position: absolute;
+    top: 0;
+    left: 0;
+    overflow: hidden;
+    pointer-events: none;
+    background: currentcolor;
+    border-radius: 50%;
+    opacity: 0;
+    will-change: transform, opacity;
+
+    &--enter {
+      opacity: 0;
+      transition: none;
+    }
+
+    &--in {
+      opacity: $ripple-animation-visible-opacity;
+      transition: $ripple-animation-transition-in;
+    }
+
+    &--out {
+      opacity: 0;
+      transition: $ripple-animation-transition-out;
+    }
+  }
+}