added database provider & refactor sql execute

src/components/contexts/database.tsx

@@ -0,0 +1,13 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { createContext } from 'react';
+import Database from 'tauri-plugin-sql-api';
+
+export const DatabaseContext = createContext({});
+
+const db = typeof window !== 'undefined' ? await Database.load('sqlite:lume.db') : null;
+
+export default function DatabaseProvider({ children }: { children: React.ReactNode }) {
+  const value = db;
+
+  return <DatabaseContext.Provider value={value}>{children}</DatabaseContext.Provider>;
+}

src/components/contexts/relay.tsx

@@ -0,0 +1,11 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { RelayPool } from 'nostr-relaypool';
+import { createContext, useMemo } from 'react';
+
+export const RelayContext = createContext({});
+
+export default function RelayProvider({ relays, children }: { relays: any; children: React.ReactNode }) {
+  const value = useMemo(() => new RelayPool(relays, { useEventCache: false }), [relays]);
+
+  return <RelayContext.Provider value={value}>{children}</RelayContext.Provider>;
+}