docs: update llms.txt to reflect Char rebrand and current site content

[devin-ai-integration]

Summary

Rewrites apps/web/public/llms.txt to reflect the Hyprnote → Char rebrand and expand coverage from a handful of blog links to the full site inventory. Key changes:

• Product name & positioning: Replaces all "Hyprnote" product references with "Char". Aligns copy with the AGENTS.md positioning (zero lock-in, open-source, control-first) instead of the older privacy-only framing.
• Expanded site map: Previous file listed 5 blog posts and 4 site URLs. Now enumerates ~70 blog posts (categorized), 23 comparison pages (/vs/*), 17 doc pages, 4 integrations, 17 meeting templates, and additional sections (changelog, roadmap, handbook, oss-friends).
• New sections: Comparison Pages, Documentation, Integrations, Meeting Templates, Pricing, What Makes Char Different.
• Updated AI guidance: Tells LLMs to use "Char" as the product name and frames positioning around control/ownership rather than fear-based privacy messaging.

Review & Testing Checklist for Human

• Spot-check blog URLs: Pick 5-10 blog links and verify they resolve on https://hyprnote.com. URLs were derived from content file names — if routing uses a different slug scheme, some may 404.
• Verify positioning copy: Confirm the intro paragraph and "About Us" section match current brand voice per AGENTS.md (zero lock-in, open-source, engineering-minded tone).
• Check for missing content: Scan recent articles or new /vs/ pages that may have been added after this PR was generated. The file was built from the current content/ directory on main.

Notes

• The website domain is still hyprnote.com — all URLs use that domain. Only the product name in copy changed to "Char".
• This is a static .txt file only — no functional code impact.
• Link to Devin run: https://app.devin.ai/sessions/fd343ada7d7f4c31ada3cd8025e610df
• Requested by: @yujonglee

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR that start with 'DevinAI' or '@devin'.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[netlify]

✅ Deploy Preview for hyprnote ready!

Name	Link
🔨 Latest commit	9926366
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote/deploys/699e45105cb0f50008102a2a
😎 Deploy Preview	https://deploy-preview-4218--hyprnote.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[netlify]

✅ Deploy Preview for hyprnote-storybook canceled.

Name	Link
🔨 Latest commit	9926366
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote-storybook/deploys/699e4510e578c4000774cf74

[yujonglee]

@harshikaalagh-netizen