Refactoring: move all code files into a src directory

src/UI/Base/ShareButton.svelte

@@ -0,0 +1,30 @@
+<script lang="ts">
+  import ToSvelte from "./ToSvelte.svelte"
+  import Svg from "../../Svg"
+
+  export let generateShareData: () => {
+    text: string
+    title: string
+    url: string
+  }
+  function share() {
+    if (!navigator.share) {
+      console.log("web share not supported")
+      return
+    }
+    navigator
+      .share(generateShareData())
+      .then(() => {
+        console.log("Thanks for sharing!")
+      })
+      .catch((err) => {
+        console.log(`Couldn't share because of`, err.message)
+      })
+  }
+</script>
+
+<button on:click={share} class="secondary m-0 h-8 w-8 p-0">
+  <slot name="content">
+    <ToSvelte construct={Svg.share_svg().SetClass("w-7 h-7 p-1")} />
+  </slot>
+</button>