Enhance start.bat with improved Node.js v23 compatibility and build process

- Add memory allocation increase (--max-old-space-size=4096)
- Add theme building step using lessc before starting the app
- Change from yarn start to yarn run craco start
- Add error handling with proper exit codes
- Improve script structure with goto statements for better flow control

Author: Maphikza

start.bat

@@ -1,6 +1,20 @@
 @echo off
 REM This script sets the necessary environment variable and starts the React app
 
-echo Setting OpenSSL legacy provider and starting the app...
-set NODE_OPTIONS=--openssl-legacy-provider
-yarn start
+echo Setting OpenSSL legacy provider and increasing memory allocation...
+set "NODE_OPTIONS=--openssl-legacy-provider --max-old-space-size=4096"
+
+REM Run lessc directly using local node_modules
+call node_modules\.bin\lessc --js --clean-css="--s1 --advanced" src/styles/themes/main.less public/themes/main.css
+if errorlevel 1 goto error
+
+echo Theme built successfully, starting the app...
+call yarn run craco start
+if errorlevel 1 goto error
+goto end
+
+:error
+echo Failed with error #%errorlevel%.
+exit /b %errorlevel%
+
+:end