chore: stop tracking generated build files, fix sponsors workflow and refresh README hero

package.json

@@ -5,6 +5,7 @@
   "license": "AGPL-3.0-only",
   "type": "module",
   "scripts": {
+    "predev": "node scripts/generate-blog.mjs && node scripts/generate-static-tool-links.mjs",
     "dev": "vite",
     "build": "node scripts/generate-blog.mjs && node scripts/generate-static-tool-links.mjs && tsc && vite build && node scripts/enhance-seo-pages.mjs && NODE_OPTIONS='--max-old-space-size=3072' node scripts/generate-i18n-pages.mjs && node scripts/generate-sitemap.mjs && node scripts/generate-security-headers.mjs && node scripts/seo-audit.mjs",
     "seo-audit": "node scripts/seo-audit.mjs",