refactor: Enhance environment configuration and loading mechanism

- Implement flexible environment variable loading strategy
- Add support for environment-specific and local override configuration files
- Create new `loadEnv.ts` module for dynamic environment configuration
- Update configuration loading in multiple config files
- Remove deprecated `.env.development.template`
- Add setup script for environment validation
- Improve WebSocket error handling and client configuration

README.md

@@ -38,7 +38,7 @@ MCP (Model Context Protocol) Server is a lightweight integration tool for Home A
 git clone https://github.com/jango-blockchained/homeassistant-mcp.git
 cd homeassistant-mcp
 
-# Copy and edit environment configuration
+# Copy environment template:
 cp .env.example .env
 # Edit .env with your Home Assistant credentials and speech features settings