[node] begin the great typescript rewrite

nodejs/database/tokens.ts

@@ -0,0 +1,14 @@
+import db from './db.ts';
+
+const addTokenStatement = db.prepare(`INSERT INTO tokens(data) VALUES (?);`);
+const getTokenStatement = db.prepare(`SELECT data FROM tokens;`);
+
+export function addToken(token: string) {
+	addTokenStatement.run(token);
+}
+
+export function getToken(): string|null {
+	const data = getTokenStatement.get() as {data: string}|undefined;
+	if (data === undefined) return null;
+	return data.data;
+}