add webdirt with some default samples

packages/webdirt/webdirt.mjs

@@ -0,0 +1,32 @@
+import * as strudel from '@strudel.cycles/core';
+const { Pattern } = strudel;
+import * as WebDirt from 'WebDirt';
+
+let webDirt;
+
+/*
+example config:
+{
+    sampleMapUrl: 'EmuSP12.json',
+    sampleFolder: 'EmuSP12',
+}
+*/
+export function loadWebDirt(config) {
+  webDirt = new WebDirt.WebDirt(config);
+  webDirt.initializeWebAudio();
+}
+
+Pattern.prototype.webdirt = function () {
+  // create a WebDirt object and initialize Web Audio context
+  return this._withHap((hap) => {
+    const onTrigger = (time, e, currentTime) => {
+      if (!webDirt) {
+        throw new Error('WebDirt not initialized!');
+      }
+      const deadline = time - currentTime;
+      const { s, n = 0 } = e.value;
+      webDirt.playSample({ s, n }, deadline);
+    };
+    return hap.setContext({ ...hap.context, onTrigger });
+  });
+};