fix: add language tags to code blocks and fix markdown formatting

- Add 'text' language tag to log output and ASCII art code blocks

- Add blank lines before lists per markdownlint rules

- Fixes markdownlint MD040 errors

Author: dgenio

examples/servers/simple-proxy/README.md

@@ -12,6 +12,7 @@ A simple MCP proxy server that demonstrates the `mcp_proxy()` pattern by forward
 ## Use Cases
 
 This proxy pattern is useful for:
+
 - **Debugging**: Inspect MCP protocol messages between client and server
 - **Monitoring**: Log and track MCP interactions
 - **Gateway**: Add authentication, rate limiting, or other middleware
@@ -72,7 +73,7 @@ asyncio.run(main())
 
 When inspection is enabled, the proxy logs messages flowing through it:
 
-```
+```text
 INFO:__main__:Starting MCP proxy to: uv run mcp-simple-tool
 INFO:__main__:Proxy connections established
 INFO:__main__:Proxy is running. Press Ctrl+C to stop.
@@ -109,7 +110,7 @@ async with mcp_proxy(
 
 ## Architecture
 
-```
+```text
 ┌─────────┐         ┌───────────────┐         ┌─────────┐
 │  MCP    │◄───────►│  MCP Proxy    │◄───────►│  MCP    │
 │ Client  │  stdio  │   (this)      │  stdio  │ Server  │
@@ -120,6 +121,7 @@ async with mcp_proxy(
 ```
 
 The proxy creates two transport connections:
+
 - **Client-facing**: Communicates with the MCP client via stdin/stdout
 - **Server-facing**: Communicates with the backend MCP server via stdio_client