Add port availability check to setup scripts

Before starting Docker containers, setup scripts now check if required
ports are available and warn users about conflicts.

Features:
- Checks all required ports: 8080, 8025, 1025, 6379
- Checks database port based on selection (3306 for MySQL, 5432 for PostgreSQL)
- Shows clear status for each port (Available/In Use)
- If conflicts found:
  - Displays warning message
  - Shows helpful commands to find and stop conflicting processes
  - Asks user if they want to continue anyway
  - Exits if user chooses not to continue

Benefits:
- Prevents confusing 'port already in use' errors during container startup
- Provides clear diagnostic information
- Gives users control over how to handle conflicts
- Improves setup experience and reduces frustration

Implementation:
- setup.bat: Uses netstat with findstr for Windows
- setup.sh: Uses lsof and netstat for Linux/Mac compatibility

setup.bat

@@ -24,7 +24,90 @@ echo.
 echo Setting up with %DB%...
 echo.
 
-REM Step 1: Configure environment
+REM Step 1: Check port availability
+echo Checking port availability...
+set PORTS_OK=1
+
+REM Check port 8080 (Nginx)
+netstat -ano | findstr ":8080 " | findstr "LISTENING" >nul 2>&1
+if %errorlevel% equ 0 (
+    echo [X] Port 8080 (Web Server) - IN USE
+    set PORTS_OK=0
+) else (
+    echo [√] Port 8080 (Web Server) - Available
+)
+
+REM Check port 8025 (Mailpit Dashboard)
+netstat -ano | findstr ":8025 " | findstr "LISTENING" >nul 2>&1
+if %errorlevel% equ 0 (
+    echo [X] Port 8025 (Mailpit Dashboard) - IN USE
+    set PORTS_OK=0
+) else (
+    echo [√] Port 8025 (Mailpit Dashboard) - Available
+)
+
+REM Check port 1025 (Mailpit SMTP)
+netstat -ano | findstr ":1025 " | findstr "LISTENING" >nul 2>&1
+if %errorlevel% equ 0 (
+    echo [X] Port 1025 (Mailpit SMTP) - IN USE
+    set PORTS_OK=0
+) else (
+    echo [√] Port 1025 (Mailpit SMTP) - Available
+)
+
+REM Check port 6379 (Redis)
+netstat -ano | findstr ":6379 " | findstr "LISTENING" >nul 2>&1
+if %errorlevel% equ 0 (
+    echo [X] Port 6379 (Redis) - IN USE
+    set PORTS_OK=0
+) else (
+    echo [√] Port 6379 (Redis) - Available
+)
+
+REM Check database port based on selection
+if "%DB%"=="mysql" (
+    netstat -ano | findstr ":3306 " | findstr "LISTENING" >nul 2>&1
+    if !errorlevel! equ 0 (
+        echo [X] Port 3306 (MySQL) - IN USE
+        set PORTS_OK=0
+    ) else (
+        echo [√] Port 3306 (MySQL) - Available
+    )
+)
+
+if "%DB%"=="pgsql" (
+    netstat -ano | findstr ":5432 " | findstr "LISTENING" >nul 2>&1
+    if !errorlevel! equ 0 (
+        echo [X] Port 5432 (PostgreSQL) - IN USE
+        set PORTS_OK=0
+    ) else (
+        echo [√] Port 5432 (PostgreSQL) - Available
+    )
+)
+
+REM Handle port conflicts
+if %PORTS_OK% equ 0 (
+    echo.
+    echo WARNING: Some required ports are already in use!
+    echo.
+    echo To find what's using a port:
+    echo   netstat -ano ^| findstr ":PORT"
+    echo.
+    echo To stop a process using a port:
+    echo   1. Find the PID from netstat output
+    echo   2. taskkill /PID [PID] /F
+    echo.
+    choice /C YN /M "Do you want to continue anyway"
+    if errorlevel 2 (
+        echo Setup cancelled.
+        exit /b 1
+    )
+    echo.
+    echo Continuing with setup...
+)
+echo.
+
+REM Step 2: Configure environment
 echo Configuring environment...
 if exist "src\.env.%DB%" (
     copy /y "src\.env.%DB%" "src\.env" >nul
@@ -34,25 +117,25 @@ if exist "src\.env.%DB%" (
     exit /b 1
 )
 
-REM Step 2: Build containers
+REM Step 3: Build containers
 echo Building Docker containers...
 docker-compose build
 echo Containers built
 echo.
 
-REM Step 3: Start containers
+REM Step 4: Start containers
 echo Starting Docker containers...
 docker-compose --profile %DB% up -d
 echo Containers started
 echo.
 
-REM Step 4: Wait for app container to be ready
+REM Step 5: Wait for app container to be ready
 echo Waiting for app container...
 timeout /t 3 /nobreak >nul
 echo App container ready
 echo.
 
-REM Step 5: Wait for database
+REM Step 6: Wait for database
 if "%DB%"=="mysql" (
     echo Waiting for database...
     timeout /t 5 /nobreak >nul
@@ -66,25 +149,25 @@ if "%DB%"=="pgsql" (
     echo.
 )
 
-REM Step 6: Generate app key
+REM Step 7: Generate app key
 echo Generating application key...
 docker-compose exec -T app php artisan key:generate --force
 echo App key generated
 echo.
 
-REM Step 7: Run migrations
+REM Step 8: Run migrations
 echo Running database migrations...
 docker-compose exec -T app php artisan migrate --force
 echo Migrations completed
 echo.
 
-REM Step 8: Seed database
+REM Step 9: Seed database
 echo Seeding database (roles, permissions, admin user)...
 docker-compose exec -T app php artisan db:seed --force
 echo Database seeded
 echo.
 
-REM Step 9: Create storage link
+REM Step 10: Create storage link
 echo Creating storage symlink...
 docker-compose exec -T app php artisan storage:link
 echo Storage linked