⚙️ Create pkgManager store for managing package manager selection

src/stores/pkgManager.store.ts

@@ -0,0 +1,32 @@
+import { writable } from "svelte/store";
+import { browser } from "$app/environment";
+
+type PackageManager = "npm" | "pnpm" | "yarn" | "bun";
+
+const localStorageKey = "svgl_package_manager";
+const defaultValue: PackageManager = "npm";
+
+function getInitialValue(): PackageManager {
+  if (browser) {
+    const stored = localStorage.getItem(localStorageKey);
+    if (
+      stored === "npm" ||
+      stored === "pnpm" ||
+      stored === "yarn" ||
+      stored === "bun"
+    ) {
+      return stored;
+    }
+  }
+  return defaultValue;
+}
+
+const pkgManager = writable<PackageManager>(getInitialValue());
+
+pkgManager.subscribe((value) => {
+  if (browser) {
+    localStorage.setItem(localStorageKey, value);
+  }
+});
+
+export { pkgManager, type PackageManager };