add duckdb-ui-client & other ts pkgs (#10)

* add duckdb-ui-client & other ts pkgs

* workflow fixes

* fix working dir

* no sparse checkout; specify package.json path

* path to pnpm-lock.yaml

* add check & build test

* workflow step descriptions

* use comments & names

* one more naming tweak

ts/pkgs/duckdb-ui-client/test/serialization/classes/BinaryStreamReader.test.ts

@@ -0,0 +1,30 @@
+import { expect, suite, test } from 'vitest';
+import { BinaryStreamReader } from '../../../src/serialization/classes/BinaryStreamReader';
+import { makeBuffer } from '../../helpers/makeBuffer';
+
+suite('BinaryStreamReader', () => {
+  test('basic', () => {
+    const reader = new BinaryStreamReader(
+      makeBuffer([11, 22, 33, 44, 0x12, 0x34]),
+    );
+
+    expect(reader.getOffset()).toBe(0);
+    expect(reader.peekUint8()).toBe(11);
+    expect(reader.readUint8()).toBe(11);
+
+    expect(reader.getOffset()).toBe(1);
+    expect(reader.peekUint8()).toBe(22);
+    expect(reader.readUint8()).toBe(22);
+
+    expect(reader.getOffset()).toBe(2);
+    reader.consume(2);
+    expect(reader.getOffset()).toBe(4);
+    expect(reader.peekUint16(false)).toBe(0x1234);
+    expect(reader.peekUint16(true)).toBe(0x3412);
+
+    const dv = reader.readData(2);
+    expect(dv.byteLength).toBe(2);
+    expect(dv.getUint8(0)).toBe(0x12);
+    expect(dv.getUint8(1)).toBe(0x34);
+  });
+});