update .env.example and README with additional bot configuration options

.env.example

@@ -2,25 +2,56 @@
 # TELEGRAM BOT CONFIGURATION
 # ============================================
 
-# Telegram Bot Token (Required)
+# Telegram Bot Token
 # Get it from BotFather: https://t.me/botfather
 BOT_TOKEN=your_bot_token_here
 
-# Creator ID (Required)
+# Creator ID
 # Your Telegram user ID - the bot will recognize you as creator
 CREATOR_ID=your_user_id_here
 
 # ============================================
-# OPTIONAL: AI MODELS
+# BOT SETTINGS (Optional)
+# ============================================
+
+# Bot Prefix for commands
+BOT_PREFIX=
+
+# Whitelist of chat IDs (comma-separated)
+# Example: 123456789,987654321
+CHAT_IDS_WHITELIST=
+
+# Test environment mode
+TEST_ENVIRONMENT=false
+
+# Docker deployment
+IS_DOCKER=false
+
+# Only creator can use bot
+ONLY_FOR_CREATOR_MODE=false
+
+# Use user names in AI prompts
+USE_NAMES_IN_PROMPT=true
+
+# Maximum photo size in pixels
+MAX_PHOTO_SIZE=1280
+
+# ============================================
+# AI MODELS CONFIGURATION (Optional)
 # ============================================
 
 # Google Gemini
 GEMINI_API_KEY=
+GEMINI_MODEL=gemini-2.5-flash
 
 # Mistral AI
 MISTRAL_API_KEY=
+MISTRAL_MODEL=mistral-small-latest
 
-# Ollama (Local)
+# Ollama (Local AI Model)
 OLLAMA_ADDRESS=
 OLLAMA_MODEL=
-SYSTEM_PROMPT=
+OLLAMA_API_KEY=
+
+# Custom system prompt for AI
+SYSTEM_PROMPT=