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-data-values/test/DuckDBUUIDValue.test.ts

@@ -0,0 +1,49 @@
+import { expect, suite, test } from 'vitest';
+import { DuckDBUUIDValue } from '../src/DuckDBUUIDValue';
+
+suite('DuckDBUUIDValue', () => {
+  test('should render all zero bytes to the correct string', () => {
+    expect(
+      new DuckDBUUIDValue(
+        new Uint8Array([
+          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+          0x00, 0x00, 0x00, 0x00, 0x00,
+        ]),
+      ).toString(),
+    ).toStrictEqual('00000000-0000-0000-0000-000000000000');
+  });
+  test('should render all max bytes to the correct string', () => {
+    expect(
+      new DuckDBUUIDValue(
+        new Uint8Array([
+          0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+          0xff, 0xff, 0xff, 0xff, 0xff,
+        ]),
+      ).toString(),
+    ).toStrictEqual('ffffffff-ffff-ffff-ffff-ffffffffffff');
+  });
+  test('should render arbitrary bytes to the correct string', () => {
+    expect(
+      new DuckDBUUIDValue(
+        new Uint8Array([
+          0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87, 0xfe, 0xdc, 0xba,
+          0x98, 0x76, 0x54, 0x32, 0x10,
+        ]),
+      ).toString(),
+    ).toStrictEqual('f0e1d2c3-b4a5-9687-fedc-ba9876543210');
+  });
+  test('should render a uint128 to the correct string', () => {
+    expect(
+      DuckDBUUIDValue.fromUint128(
+        0xf0e1d2c3b4a59687fedcba9876543210n,
+      ).toString(),
+    ).toStrictEqual('f0e1d2c3-b4a5-9687-fedc-ba9876543210');
+  });
+  test('should render a stored hugeint to the correct string', () => {
+    expect(
+      DuckDBUUIDValue.fromStoredHugeint(
+        0x70e1d2c3b4a59687fedcba9876543210n, // note the flipped MSB
+      ).toString(),
+    ).toStrictEqual('f0e1d2c3-b4a5-9687-fedc-ba9876543210');
+  });
+});