feat: Add setup script for API key configuration and .env file management

setup_env.bat

@@ -0,0 +1,121 @@
+@echo off
+setlocal enabledelayedexpansion
+
+REM --- Configuration ---
+set "ENV_FILE=.env"
+set "DEFAULT_PROXY_KEY=VerysecretKey"
+
+REM --- Provider Name to Variable Name Mapping ---
+set "provider_count=0"
+set "provider_list[1]=Gemini" & set "provider_vars[1]=GEMINI" & set /a provider_count+=1
+set "provider_list[2]=OpenRouter" & set "provider_vars[2]=OPENROUTER" & set /a provider_count+=1
+set "provider_list[3]=Chutes" & set "provider_vars[3]=CHUTES" & set /a provider_count+=1
+set "provider_list[4]=Nvidia" & set "provider_vars[4]=NVIDIA_NIM" & set /a provider_count+=1
+set "provider_list[5]=OpenAI" & set "provider_vars[5]=OPENAI" & set /a provider_count+=1
+set "provider_list[6]=Anthropic" & set "provider_vars[6]=ANTHROPIC" & set /a provider_count+=1
+set "provider_list[7]=Mistral" & set "provider_vars[7]=MISTRAL" & set /a provider_count+=1
+set "provider_list[8]=Groq" & set "provider_vars[8]=GROQ" & set /a provider_count+=1
+set "provider_list[9]=Cohere" & set "provider_vars[9]=COHERE" & set /a provider_count+=1
+set "provider_list[10]=Bedrock" & set "provider_vars[10]=BEDROCK" & set /a provider_count+=1
+
+
+:main
+cls
+echo =================================================================
+echo      Welcome to the API Key Setup for Your Proxy Server
+echo =================================================================
+echo.
+echo This script will help you set up your .env file.
+echo.
+
+REM --- Ensure .env file exists and has PROXY_API_KEY ---
+if not exist "%ENV_FILE%" (
+    echo Creating a new %ENV_FILE% file for you...
+    echo PROXY_API_KEY="%DEFAULT_PROXY_KEY%" > "%ENV_FILE%"
+    echo.
+) else (
+    findstr /C:"PROXY_API_KEY=" "%ENV_FILE%" >nul
+    if errorlevel 1 (
+        echo Adding the default proxy key to your .env file...
+        echo.>> "%ENV_FILE%"
+        echo PROXY_API_KEY="%DEFAULT_PROXY_KEY%" >> "%ENV_FILE%"
+        echo.
+    )
+)
+
+:get_provider
+echo -----------------------------------------------------------------
+echo Please choose a provider to add an API key for:
+echo -----------------------------------------------------------------
+echo.
+for /L %%i in (1,1,%provider_count%) do (
+    echo   %%i. !provider_list[%%i]!
+)
+echo.
+set /p "choice=Type the number of the provider and press Enter: "
+
+REM --- Validate Provider Choice ---
+set "VAR_NAME="
+set "provider_choice="
+if %choice% GTR 0 if %choice% LEQ %provider_count% (
+    set "VAR_NAME=!provider_vars[%choice%]!"
+    set "provider_choice=!provider_list[%choice%]!"
+)
+
+if not defined VAR_NAME (
+    cls
+    echo =================================================================
+    echo      INVALID SELECTION! Please try again.
+    echo =================================================================
+    echo.
+    pause
+    goto :get_provider
+)
+
+set "API_VAR_BASE=%VAR_NAME%_API_KEY"
+
+:get_key
+echo.
+echo -----------------------------------------------------------------
+set /p "api_key=Enter the API key for %provider_choice%: "
+if not defined api_key (
+    echo You must enter an API key.
+    goto :get_key
+)
+echo -----------------------------------------------------------------
+echo.
+
+REM --- Find the next available key number ---
+set /a key_index=1
+:find_next_key
+findstr /R /C:"^%API_VAR_BASE%_%key_index% *=" "%ENV_FILE%" >nul
+if %errorlevel% equ 0 (
+    set /a key_index+=1
+    goto :find_next_key
+)
+
+REM --- Append the new key to the .env file ---
+echo Adding your key to %ENV_FILE%...
+echo %API_VAR_BASE%_%key_index%="%api_key%" >> "%ENV_FILE%"
+echo.
+echo Successfully added %provider_choice% API key as %API_VAR_BASE%_%key_index%!
+echo.
+
+:ask_another
+set /p "another=Do you want to add another key? (yes/no): "
+if /i "%another%"=="yes" (
+    goto :main
+)
+if /i "%another%"=="y" (
+    goto :main
+)
+
+cls
+echo =================================================================
+echo      Setup Complete! Your .env file is ready.
+echo =================================================================
+echo.
+echo You can now run the proxy server.
+echo.
+pause
+exit /b