Add heart icon

CHANGELOG.md

@@ -44,6 +44,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   - `camera`
   - `cloud`
   - `folder`
+  - `heart`
   - `mail`
   - `lock`
   - `search`

icons-manifest.json

 [
   "feather",
   "home",
+  "heart",
   "eye",
   "eye-off",
   "search",

icons/heart.svg

+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M20.84,4.61a5.5,5.5,0,0,0-7.78,0L12,5.67,10.94,4.61a5.5,5.5,0,0,0-7.78,7.78l1.06,1.06L12,21.23l7.78-7.78,1.06-1.06A5.5,5.5,0,0,0,20.84,4.61Z"/>
+</svg>
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