docs: add repo overview (#337)

AGENT.md

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+# Repo Overview
+
+This repository hosts the core of the UnstoppableSwap project. The code base is a Rust workspace with multiple crates and a Tauri based GUI.
+
+## Important directories
+
+- **swap/** – contains the main Rust crate with two binaries:
+  - `swap` – command line interface for performing swaps.
+  - `asb` – Automated Swap Backend for market makers.
+  It also hosts library code shared between the binaries and integration tests.
+- **src-tauri/** – Rust crate that exposes the `swap` functionality to the Tauri front end and bundles the application.
+- **src-gui/** – The front‑end written in TypeScript/React and bundled by Tauri. Communicates with `src-tauri` via Tauri commands.
+- **monero-rpc/** and **monero-wallet/** – helper crates for interacting with the Monero ecosystem.
+- **docs/** – Next.js documentation site.
+- **dev-docs/** – additional markdown documentation for CLI and ASB.
+
+## Frequently edited files
+
+Looking at the latest ten pull requests in `git log`, the following files appear most often:
+
+| File | Times Changed |
+| ---- | ------------- |
+| `src-tauri/Cargo.toml` | 7 |
+| `Cargo.lock` | 7 |
+| `CHANGELOG.md` | 7 |
+| `swap/Cargo.toml` | 6 |
+| `src-tauri/tauri.conf.json` | 5 |
+| `.github/workflows/ci.yml` | 3 |
+
+Other files such as `swap/src/bin/asb.rs`, `swap/src/cli/api.rs`, and `src-gui/package.json` showed up less frequently.
+
+## Component interaction
+
+- The **swap** crate implements the atomic swap logic and provides a CLI. The binaries under `swap/src/bin` (`swap.rs` and `asb.rs`) start the client and maker services respectively.
+- **src-tauri** wraps the swap crate and exposes its functionality to the GUI via Tauri commands. It also bundles the application with the `src-gui` assets.
+- **src-gui** is the TypeScript/React interface. It communicates with the Rust back end through the commands defined in `src-tauri`.
+- Helper crates like **monero-rpc** and **monero-wallet** provide abstractions over external services. They are used by the swap crate to interact with Monero.
+- Continuous integration and release workflows live in `.github/workflows`. They build binaries, create releases and lint the code base.
+