add scripts for pkg creation for mac

release_files/darwin_pkg/postinstall

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+APP=/Applications/NetBird.app
+AGENT=/usr/local/bin/netbird
+
+{
+    echo "Installing NetBird..."
+
+    if test -d $APP; then
+        echo "NetBird app copied successfully."
+    else
+        echo "NetBird app could not be copied to the Applications folder."
+        exit 1
+    fi
+
+    ln -s $APP/netbird $AGENT
+    if test -f $AGENT; then
+        echo "NetBird binary linked successfully."
+    else
+        echo "NetBird could not create symlink to /usr/local/bin"
+        exit 1
+    fi
+
+    $AGENT service install
+    $AGENT service start
+
+    open $APP
+
+    echo "Finished Netbird installation successfully"
+    exit 0 # all good
+} > /tmp/my_postinstall.log

release_files/darwin_pkg/preinstall

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+{
+    echo "Preinstall complete"
+    exit 0 # all good
+} > /tmp/my_preinstall.log

release_files/darwin_pkg/requirements.plist

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+        <key>arch</key>
+        <array>
+                <string>x86_64</string>
+                <string>arm64</string>
+        </array>
+</dict>
+</plist>