Refactor: Update build scripts and improve Telnet handling in SSH flasher

run.bat

@@ -3,14 +3,15 @@ REM IoT Firmware Loader - Windows launcher
 
 cd /d "%~dp0"
 
-if exist "venv" (
-    call venv\Scripts\activate.bat
-) else (
+if not exist "venv" (
     echo Creating virtual environment...
     python -m venv venv
-    call venv\Scripts\activate.bat
-    pip install PyQt6 scapy requests
 )
 
+call venv\Scripts\activate.bat
+
+echo Checking and installing required packages...
+pip install -r requirements.txt --quiet
+
 echo Starting IoT Firmware Loader...
 python main.py