Initial docs (#61)

Add initial documentation site.

Co-authored-by: ambiguous48 <33713262+ambiguous48@users.noreply.github.com>

src/lib/utils/run-with-cleanup.ts

@@ -0,0 +1,24 @@
+import { onDestroy } from "svelte";
+
+export function createRunWithCleanup() {
+  let cleanup: { [key: string]: () => any } = {};
+
+  onDestroy(() => {
+    for (const id in cleanup) {
+      cleanup[id]();
+      delete cleanup[id];
+    }
+  })
+
+  return (fn: () => any, id: string) => {
+    if (cleanup[id]) {
+      cleanup[id]();
+      delete cleanup[id];
+    }
+
+    const result = fn();
+    if (typeof result === "function") {
+      cleanup[id] = result;
+    }
+  }
+}