feat: Add initial project documentation (README) and MIT license.

LICENSE

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+MIT License
+
+Copyright (c) 2025 Gabriel Kaszewski
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# K-Notes
+
+A modern, self-hosted note-taking application built with performance, security, and clean architecture in mind.
+
+![K-Notes Logo](k-notes-frontend/public/logo.png)
+
+## Features
+
+- **Authentication**: Secure user registration and login.
+- **Note Management**: Create, edit, pin, archive, and delete notes.
+- **Rich Text**: Markdown support for note content.
+- **Version History**: Track changes, view history, note diffs, download versions, and restore previous states.
+- **Organization**: Tagging system for easy filtering.
+- **Theme**: Dark and Light mode support.
+- **Responsive**: Mobile-friendly UI built with Tailwind CSS.
+- **Architecture**:
+    - **Backend**: Hexagonal Architecture (Domain, Infra, API layers) in Rust.
+    - **Frontend**: Modern React with TypeScript and Vite.
+- **Deployment**: Full Docker support with `compose.yml`.
+
+## Tech Stack
+
+### Backend
+- **Language**: Rust
+- **Framework**: Axum
+- **Database**: SQLite (SQLx)
+- **Dependency Injection**: Manual wiring for clear boundaries
+
+### Frontend
+- **Framework**: React + Vite
+- **Language**: TypeScript
+- **Styling**: Tailwind CSS + Shadcn UI
+- **State Management**: TanStack Query (React Query)
+
+## Getting Started
+
+### Docker (Recommended)
+
+Run the entire stack with a single command:
+
+```bash
+docker compose up -d --build
+```
+
+- **Frontend**: http://localhost:8080
+- **Backend**: http://localhost:3000
+
+The frontend is automatically configured to talk to the backend.
+
+### Local Development
+
+#### Backend
+
+1.  Navigate to the `notes-api` directory (or root).
+2.  Set up the environment variables (see `.env.example`).
+3.  Run the server:
+
+```bash
+cargo run -p notes-api
+```
+
+#### Frontend
+
+1.  Navigate to `k-notes-frontend`.
+2.  Install dependencies:
+
+```bash
+bun install
+```
+
+3.  Run the dev server:
+
+```bash
+bun dev
+```
+
+## 🏗️ Project Structure
+
+```
+├── notes-api       # API Interface (Axum, HTTP routes)
+├── notes-domain    # Core Business Logic (Entities, Services, Ports)
+├── notes-infra     # Infrastructure (Database adapters, Repositories)
+├── k-notes-frontend # React Frontend Application
+├── migrations      # SQLx Database Migrations
+└── compose.yml     # Docker Composition
+```
+
+## License
+
+MIT