Switch to Playwright to bypass Newegg bot detection, closes #2

Newegg now blocks requests-based scraping; replace with Playwright
using headless Chromium with mouse simulation to pass bot detection.
Also fix hardcoded build output path, use os.makedirs for nested dirs,
update category labels (HDD/SATA SSD/NVMe SSD), drop near-empty 2.5"
internal and laptop HDD categories, and fix invalid HTML in index
template (h2 inside table cells).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/index.html

@@ -13,9 +13,9 @@ Comments welcome: edward@4angle.com
 
 <p>Last updated: {{ today.strftime('%d %B %Y') }}.<p>
 
-<table>
 {% for cat in best %}
-<tr><td colspan="4"><h2>{{ cat.label }}</h2></td></tr>
+<h2>{{ cat.label }}</h2>
+<table>
 <tr>
 <th align="right">Price<br>per TB</th>
 <th align="right">Price</th>
@@ -30,7 +30,7 @@ Comments welcome: edward@4angle.com
 <td><a href="https://www.newegg.com/Product/Product.aspx?Item={{ hdd.number }}">{{ hdd.title }}</a></td>
 </tr>
 {% endfor %}
-<tr><td colspan="4"><a href="{{ cat.name }}/index.html">more</a></td></tr>
-{% endfor %}
 </table>
+<p><a href="{{ cat.name }}/index.html">more</a></p>
+{% endfor %}
 {% endblock %}