Add Regtest setup guide for macOS

REGTEST_GUIDE.md

@@ -0,0 +1,108 @@
+✍️ RECOMMENDED REGTEST_GUIDE.md Content
+
+# Fractal Bitcoin Regtest Setup (macOS Guide)
+
+This guide walks you through building and running Fractal Bitcoin in `regtest` mode on macOS.
+
+---
+
+## ✅ Prerequisites
+
+- macOS 13 or newer
+- Homebrew installed
+- GitHub account
+- Xcode Command Line Tools
+
+```bash
+xcode-select --install
+
+____________________________________________
+
+📦 Install Dependencies
+
+bash
+
+brew install autoconf automake libtool berkeley-db@4 pkg-config boost
+
+___________________________________________
+
+🧱 Build Fractal
+
+Bash
+
+git clone https://github.com/YOUR_USERNAME/fractal.git
+cd fractal
+./autogen.sh
+./configure --with-incompatible-bdb
+make -j$(sysctl -n hw.ncpu)
+
+You should now have fractald and fractal-cli built under ./src.
+
+__________________________________________
+
+⚙️ Set Up Regtest Data Directory
+
+bash
+
+mkdir -p ~/fractal-data
+nano ~/fractal-data/bitcoin.conf
+
+Paste into bitcoin.conf:
+
+ini
+
+regtest=1
+server=1
+daemon=1
+rpcuser=fractaluser
+rpcpassword=fractalpass
+
+_________________________________________
+
+🚀 Start Fractal Node
+
+bash
+
+./src/fractald -regtest -datadir=$HOME/fractal-data -daemon
+
+_________________________________________
+
+🔧 Use CLI
+
+bash
+
+./src/fractal-cli -regtest -datadir=$HOME/fractal-data getblockchaininfo
+
+_________________________________________
+
+🛑 Stop Node
+
+bash
+
+./src/fractal-cli -regtest -datadir=$HOME/fractal-data stop
+
+__________________________________________
+
+✅ Optional: Mine Test BTC
+
+bash
+
+ADDR=$(./src/fractal-cli -regtest getnewaddress)
+./src/fractal-cli -regtest generatetoaddress 101 $ADDR
+./src/fractal-cli -regtest getbalance
+
+___________________________________________
+
+🛠️ Bonus: Run All as a Script
+
+Create regtest-quickstart.sh to automate setup.
+
+___________________________________________
+
+
+🙌 Credits
+
+Contributor: @Phantagyro
+
+
+