feat: bump version to 1.13.0, add macOS CI workflow

- Bump version from 1.12.0 to 1.13.0 for macOS platform support
- Add GitHub Actions workflow for building macOS DMG
- Update README version references

Author: nashsu

README.md

@@ -230,18 +230,18 @@ Below are the methods for installing the OpenModSim for different OS
 ## <img src="docs/icons/logo_windows.svg" width="16" height="16"> Microsoft Windows
 Run the installer:
 
-- For 32-bit Windows: `qt5-omodsim_1.12.0_x86.exe`
-- For 64-bit Windows: `qt5-omodsim_1.12.0_x64.exe` or `qt6-omodsim_1.12.0_x64.exe`
+- For 32-bit Windows: `qt5-omodsim_1.13.0_x86.exe`
+- For 64-bit Windows: `qt5-omodsim_1.13.0_x64.exe` or `qt6-omodsim_1.13.0_x64.exe`
 
 ## <img src="docs/icons/logo_debian.svg" width="20" height="20"> Debian / <img src="docs/icons/logo_ubuntu.svg" width="20" height="20"> Ubuntu / <img width="20" height="20" src="docs/icons/logo_mint.png" /> Mint / <img src="docs/icons/logo_zorin.png" width="20" height="20"> Zorin / <img width="22" height="22" src="docs/icons/logo_astra.png" /> Astra Linux
 ### Install
 Install the DEB package from the command line:
 ```bash
-sudo apt install ./qt6-omodsim_1.12.0-1_amd64.deb
+sudo apt install ./qt6-omodsim_1.13.0-1_amd64.deb
 ```
 or if you want to use Qt5 libraries:
 ```bash
-sudo apt install ./qt5-omodsim_1.12.0-1_amd64.deb
+sudo apt install ./qt5-omodsim_1.13.0-1_amd64.deb
 ```
 
 ### Remove
@@ -258,7 +258,7 @@ sudo apt remove qt5-omodsim
 ### Install
 Install the RPM package from the command line:
 ```bash
-sudo dnf install ./qt6-omodsim-1.12.0-1.x86_64.rpm
+sudo dnf install ./qt6-omodsim-1.13.0-1.x86_64.rpm
 ```
 
 ### Remove
@@ -271,7 +271,7 @@ sudo dnf remove qt6-omodsim
 ### Install
 Install the RPM package from the command line as root user:
 ```bash
-apt-get install ./qt6-omodsim-1.12.0-1.x86_64.rpm
+apt-get install ./qt6-omodsim-1.13.0-1.x86_64.rpm
 ```
 
 ### Remove
@@ -288,7 +288,7 @@ sudo rpm --import qt6-omodsim.rpm.pubkey
 ```
 Install the RPM package using Zypper:
 ```bash
-sudo zypper install ./qt6-omodsim-1.12.0-1.x86_64.rpm
+sudo zypper install ./qt6-omodsim-1.13.0-1.x86_64.rpm
 ```
 
 ### Remove

src/CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.16)
 
 project(omodsim
-        VERSION 1.12.0
+        VERSION 1.13.0
         DESCRIPTION "An Open Source Modbus Slave (Server) Utility"
         LANGUAGES CXX)