feat: migrate some more stuff to svelte-5, mainly app settings

app/src/lib/runtime/runtime-executor-cache.ts

@@ -0,0 +1,19 @@
+import { type SyncCache } from "@nodes/types";
+
+export class MemoryRuntimeCache implements SyncCache {
+
+  private cache: [string, unknown][] = [];
+  size = 50;
+
+  get<T>(key: string): T | undefined {
+    return this.cache.find(([k]) => k === key)?.[1] as T;
+  }
+  set<T>(key: string, value: T): void {
+    this.cache.push([key, value]);
+    this.cache = this.cache.slice(-this.size);
+  }
+  clear(): void {
+    this.cache = [];
+  }
+
+}