chore: update social preview banner + remove pending rename note

- Rendered new social-preview.png (1280x640) with v2.0 branding
- 53 skills, Frappe blue/green/purple theme, controller.py code sample
- Removed outdated repo rename note from README (rename already done)
- Added render-banner.js tool for future banner updates

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: FreekHeijting

README.md

@@ -16,7 +16,6 @@
   Built on the <a href="https://agentskills.org">Agent Skills</a> open standard.
 </p>
 
-> **Note:** A repository rename from `ERPNext_Anthropic_Claude_Development_Skill_Package` to `Frappe_Claude_Skill_Package` is pending. All skill prefixes have already been migrated from `erpnext-*` to `frappe-*`.
 
 ---
 

docs/social-preview.png

@@ -0,0 +1,15 @@
+const puppeteer = require('puppeteer');
+const path = require('path');
+
+(async () => {
+  const browser = await puppeteer.launch({headless: 'new'});
+  const page = await browser.newPage();
+  await page.setViewport({width: 1280, height: 640});
+  const htmlPath = path.resolve(__dirname, '..', 'docs', 'social-preview-banner.html');
+  const fileUrl = 'file:///' + htmlPath.split(path.sep).join('/');
+  await page.goto(fileUrl, {waitUntil: 'networkidle0', timeout: 15000});
+  const banner = await page.$('.banner');
+  await banner.screenshot({path: path.resolve(__dirname, '..', 'docs', 'social-preview.png')});
+  await browser.close();
+  console.log('OK: docs/social-preview.png rendered (1280x640)');
+})().catch(e => console.error('FAIL:', e.message));