fix: ship prebuilt lib and drop prepare for one-click git install

Avoids pnpm allowBuilds block on dsh plugin add; README install steps expanded for first-time users.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/format.js

@@ -0,0 +1,50 @@
+export function escapeHtml(text) {
+    return text
+        .replace(/&/g, '&')
+        .replace(/</g, '&lt;')
+        .replace(/>/g, '&gt;')
+        .replace(/"/g, '&quot;')
+        .replace(/'/g, '&#39;');
+}
+function inlineToHtml(text) {
+    let html = escapeHtml(text);
+    html = html.replace(/`([^`\n]+)`/g, '<code>$1</code>');
+    html = html.replace(/\*\*([^*\n]+)\*\*/g, '<b>$1</b>');
+    return html;
+}
+export function markdownToHtml(text) {
+    const parts = text.split(/```[\w-]*/);
+    if (parts.length % 2 === 0)
+        return inlineToHtml(text);
+    let html = '';
+    for (let i = 0; i < parts.length; i++) {
+        if (i % 2 === 1) {
+            const code = parts[i].replace(/^\n/, '').replace(/\n$/, '');
+            html += `<pre>${escapeHtml(code)}</pre>`;
+        }
+        else {
+            html += inlineToHtml(parts[i]);
+        }
+    }
+    return html;
+}
+export function splitMessage(text, maxLength) {
+    if (maxLength < 1)
+        throw new Error('maxLength must be >= 1');
+    if (text.length <= maxLength)
+        return [text];
+    const chunks = [];
+    let rest = text;
+    while (rest.length > maxLength) {
+        const window = rest.slice(0, maxLength);
+        const newline = window.lastIndexOf('\n');
+        const ideographic = window.lastIndexOf('。');
+        const sentence = window.lastIndexOf('. ');
+        const breakAt = Math.max(newline, ideographic, sentence);
+        const cut = breakAt > 0 ? (breakAt === sentence ? breakAt + 2 : breakAt + 1) : maxLength;
+        chunks.push(rest.slice(0, cut));
+        rest = rest.slice(cut);
+    }
+    chunks.push(rest);
+    return chunks;
+}