Add cx_setup.py for building the ReticulumMeshChatX application

- Introduced a new setup script using cx_Freeze to facilitate building the application.
- Updated version.py to maintain consistency in version string formatting.
- Modified build-backend.js to use poetry for executing the build process.

scripts/build-backend.js

@@ -1,16 +1,8 @@
 #!/usr/bin/env node
 
 const { execSync } = require('child_process');
-const path = require('path');
-const os = require('os');
-
-const platform = os.platform();
-const venvPython = platform === 'win32' 
-  ? path.join('venv', 'Scripts', 'python.exe')
-  : path.join('venv', 'bin', 'python');
-
 try {
-  execSync(`${venvPython} setup.py build`, { stdio: 'inherit' });
+  execSync(`poetry run python cx_setup.py build`, { stdio: 'inherit' });
 } catch (error) {
   console.error('Build failed:', error.message);
   process.exit(1);