Add install.sh for systems with apt

install.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+set -e
+
+if [ "$(id -u)" = "0" ]; then
+    echo "Do not run this script as root. It will ask for sudo when needed."
+    exit 1
+fi
+
+command -v apt >/dev/null 2>&1 || { echo "This script requires a Debian-based system with apt."; exit 1; }
+
+PARENT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+
+echo "=== MODEM73 Installer ==="
+echo "Install directory: $PARENT_DIR"
+echo ""
+
+PACKAGES="git build-essential libncurses-dev g++"
+
+read -rp "Install hamlib for rigctl PTT support? [y/N] " HAMLIB
+if [[ "$HAMLIB" =~ ^[Yy]$ ]]; then
+    PACKAGES="$PACKAGES libhamlib-dev libhamlib-utils"
+fi
+
+read -rp "Install libhidapi-dev for CM108 USB PTT support? [y/N] " CM108
+if [[ "$CM108" =~ ^[Yy]$ ]]; then
+    PACKAGES="$PACKAGES libhidapi-dev"
+fi
+
+echo ""
+echo "Installing packages: $PACKAGES"
+sudo apt update
+sudo apt install -y $PACKAGES
+
+cd "$PARENT_DIR"
+
+for repo in dsp code modem; do
+    if [ -d "$repo" ]; then
+        echo "$repo/ already exists, skipping clone."
+    else
+        git clone "https://github.com/aicodix/${repo}.git"
+    fi
+done
+
+if [ ! -d "modem73" ]; then
+    git clone "https://github.com/RFnexus/modem73.git"
+fi
+
+cd modem73
+make clean 2>/dev/null || true
+make -j"$(nproc)" AICODIX_DSP=../dsp AICODIX_CODE=../code MODEM_SRC=../modem
+
+echo ""
+echo "Build complete."
+echo ""
+read -rp "Install modem73 to /usr/local/bin? [y/N] " INSTALL
+if [[ "$INSTALL" =~ ^[Yy]$ ]]; then
+    sudo make install
+    echo ""
+    echo "Run: modem73 to launch"
+else
+    echo ""
+    echo "Run: cd $(pwd) && ./modem73 to launch"
+fi