sattle: Quasar PWA scaffold with lnurlcash-kit protocol core

M1: Quasar 2 / Vue 3 / TS / Pinia / i18n / PWA app shell in the lnurl-wallet
palette (#002222/#004444/#55ffcc, Noto Sans). Protocol layer is the external
lnurlcash-kit library (git dependency on the fork until upstream merges the
prepare fix / publishes to npm); keys.ts + receive.ts vendored from
lnurl-wallet with the derivation domain renamed to 'sattle'. Nix dev shell,
ci workflow (typecheck, vitest, pwa build).

src/stores/index.ts

@@ -0,0 +1,32 @@
+import { defineStore } from '#q-app';
+import { createPinia } from 'pinia';
+
+/*
+ * When adding new properties to stores, you should also
+ * extend the `PiniaCustomProperties` interface.
+ * @see https://pinia.vuejs.org/core-concepts/plugins.html#typing-new-store-properties
+ */
+declare module 'pinia' {
+  // eslint-disable-next-line @typescript-eslint/no-empty-object-type
+  export interface PiniaCustomProperties {
+    // add your custom properties here, if any
+  }
+}
+
+/*
+ * If not building with SSR mode, you can
+ * directly export the Store instantiation;
+ *
+ * The function below can be async too; either use
+ * async/await or return a Promise which resolves
+ * with the Store instance.
+ */
+
+export default defineStore((/* { ssrContext } */) => {
+  const pinia = createPinia();
+
+  // You can add Pinia plugins here
+  // pinia.use(SomePiniaPlugin)
+
+  return pinia;
+});