Add README demo in samples, update README and update typings

samples/demo.js

@@ -0,0 +1,25 @@
+const { sleep, once, delay, every, stream } = require("mhysa");
+
+async function main() {
+    const collector = stream
+        .concat(
+            stream.fromArray(["a\n", "b\n", "c\n"]),
+            stream.fromArray(["d", "e"]).pipe(stream.join("-")),
+        )
+        .pipe(stream.split("\n"))
+        .pipe(stream.flatMap(s => [s, s.toUpperCase()]))
+        .pipe(stream.collect({ objectMode: true }));
+
+    const collected = await once(collector, "data");
+    await sleep(1000); // undefined (after one second)
+    console.log(await delay(collected, 1000)); // [ 'a', 'A', 'b', 'B', 'c', 'C', 'd-e', 'D-E' ] (after another second)
+    await every(
+        [Promise.resolve("ab"), delay("cd", 1000)],
+        s => s.length === 2,
+    ); // true (after another second)
+    await every(
+        [Promise.resolve("ab"), delay("cd", 1000)],
+        s => s.length === 1,
+    ); // false (instantly)
+}
+main();