chore: rebrand organization profile for shopper-first messaging

- Update headline to emphasize savings: 'Save money on every grocery trip'
- Replace vague tagline with benefit-driven copy
- Remove tech-centric stack section (inappropriate for consumer brand)
- Add specific value proposition: save $50+/month
- Fix broken Documentation and Contributing links
- Separate shopper and developer audiences
- Simplify messaging for busy parents shopping on mobile

Co-Authored-By: Paperclip <noreply@paperclip.ing>

profile/README.md

@@ -0,0 +1,53 @@
+<p align="center">
+  <img src="cartsnitch-logo.png" alt="CartSnitch" width="400" />
+</p>
+
+<div align="center">
+
+![GitHub Org stars](https://img.shields.io/github/stars/cartsnitch)
+![GitHub followers](https://img.shields.io/github/followers/cartsnitch)
+![License](https://img.shields.io/github/license/cartsnitch/.github)
+![Profile views](https://komarev.com/ghpvc/?username=cartsnitch&color=brightgreen)
+
+</div>
+
+<h3 align="center">Save money on every grocery trip.</h3>
+
+<p align="center">
+  CartSnitch finds deals you'd miss. Never overpay for groceries again.
+</p>
+
+<p align="center">
+  <a href="https://cartsnitch.farh.net">Get Started</a>
+  ·
+  <a href="https://cartsnitch.farh.net/docs">Help & Guides</a>
+  ·
+  <a href="https://github.com/cartsnitch/.github/issues">Feedback</a>
+</p>
+
+---
+
+## How It Works
+
+CartSnitch monitors prices and deals across your favorite grocery stores in real time. Save $50+ per month with deals you actually use.
+
+### For Shoppers
+- **Real-time deal alerts** — Never miss a sale on items you buy
+- **Smart coupon matching** — One tap to find coupons for your cart
+- **Grocery tracking** — Monitor prices and plan your shopping
+
+### For Developers
+CartSnitch is built on open, modern technology and welcomes community contributions. Explore our repositories:
+
+| Repository | Purpose |
+|------------|---------|
+| [cartsnitch](https://github.com/cartsnitch/cartsnitch) | Main application |
+| [api](https://github.com/cartsnitch/api) | Backend API |
+| [common](https://github.com/cartsnitch/common) | Shared libraries |
+| [infra](https://github.com/cartsnitch/infra) | Infrastructure |
+
+---
+
+<p align="center">
+  Built with ❤️ by the CartSnitch team
+</p>