integrate repl into astro website

+ update build and setup tasks + workflow
+ move repl test folder to root
+ move docs and repl to website/src

test/tunes.test.mjs

@@ -0,0 +1,14 @@
+import { queryCode, testCycles } from './runtime.mjs';
+import * as tunes from '../website/src/repl/tunes.mjs';
+import { describe, it } from 'vitest';
+
+const tuneKeys = Object.keys(tunes);
+
+describe('renders tunes', () => {
+  tuneKeys.forEach((key) => {
+    it(`tune: ${key}`, async ({ expect }) => {
+      const haps = await queryCode(tunes[key], testCycles[key] || 1);
+      expect(haps).toMatchSnapshot();
+    });
+  });
+});