chore: deploy to Cloudflare Pages and update branding

- Add Cloudflare Pages deployment for landing page (snapotter.com) and
  docs (docs.snapotter.com)
- Create deploy-landing.yml and update deploy-docs.yml workflows
- Update CI to ignore apps/landing/** paths
- Fix logo transparency (remove white background) across all apps
- Recreate social-preview.png with SnapOtter branding
- Update all docs URLs from GitHub Pages to docs.snapotter.com
- Update VitePress config: light theme default, fix llms.txt paths
- Add .vitepress/cache/ and .env.* to gitignore

apps/landing/src/components/open-source.tsx

@@ -15,7 +15,7 @@ export function OpenSource() {
           </p>
           <div className="mt-10">
             <a
-              href="https://github.com/ashim-hq/ashim"
+              href="https://github.com/snapotter-hq/snapotter"
               target="_blank"
               rel="noopener noreferrer"
               className="inline-flex items-center gap-2 rounded-xl bg-teal px-6 py-3 text-base font-semibold text-white transition-colors hover:bg-teal-hover"