docs: add initial Gitbook version

docs/README.md

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+# Overview
+
+📁 [Github](https://github.com/zama-ai/fhevm-go) | 💛 [Community support](https://zama.ai/community) | 🟨 [Zama Bounty Program](https://github.com/zama-ai/bounty-program)
+
+<figure><img src="_static/zama_doc_header_fhevm.png" alt=""><figcaption></figcaption></figure>
+
+**fhevm-go** is an open-source library used to easily integrate the [fhEVM](https://docs.zama.ai/fhevm) into an EVM-compatible blockchain.
+
+
+## Main features
+
+fhevm-go gives your EVM the ability to compute on encrypted data using fully homomorphic encryption by:
+- a collection of operations on encrypted data via precompiled contracts
+- various additional EVM components that support encrypted computation
+
+## Target users
+
+The library helps EVM maintainers to extend their EVM with the power of FHE. If you are looking for a library to deploy and use smart contracts on an fhEVM, you should better look at [fhevm](https://docs.zama.ai/fhevm)
+
+## License
+
+This software is distributed under the BSD-3-Clause-Clear license. If you have any questions, please contact us at hello@zama.ai.

docs/SUMMARY.md

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+# Table of contents
+
+## What is fhEVM-go
+- [Overview](README.md)
+
+## Getting Started
+- [Initial Setup](getting_started/README.md)
+- [Integration](getting_started/Integration.md)
+
+## 🔗 Support
+
+- [Community forum](https://community.zama.ai)
+- [Telegram](https://t.me/+Ojt5y-I7oR42MTkx)
+- [FHE.org discord](https://discord.fhe.org)
+<!-- markdown-link-check-disable -->
+- [Twitter](https://twitter.com/zama_fhe)
+<!-- markdown-link-check-enable -->