docs: add implementation design document for I/O and multiplexing support

Author: amazon-q-developer[bot]

README.md

@@ -79,10 +79,6 @@ See the [examples directory](examples/) for more usage patterns.
 
 For users who prefer to manage their own I/O:
 
-## Sans-I/O Mode (Original)
-
-For users who prefer to manage their own I/O:
-
 ```python
 from cdp import page
 

IMPLEMENTATION.md docs/implementation.mdIMPLEMENTATION.md renamed to docs/implementation.md

@@ -1,4 +1,4 @@
-# Implementation Summary: I/O and Multiplexing Support
+# Implementation Design Document: I/O and Multiplexing Support
 
 This document summarizes the implementation of I/O capabilities and JSON-RPC framing with command multiplexing for the Chrome DevTools Protocol library.
 
@@ -181,4 +181,4 @@ This implementation successfully adds I/O capabilities and command multiplexing
 - ✅ Documentation (README, guide, examples)
 - ✅ Backward compatibility (100%)
 
-The implementation fulfills the issue requirements: "Add some IO up in this thing. Add support for the JSON RPC framing (if it's still a thing) AND multiplexing commands. Multiplex so much you can't plex any more." ✅
+The implementation fulfills the issue requirements: "Add some IO up in this thing. Add support for the JSON RPC framing (if it's still a thing) AND multiplexing commands. Multiplex so much you can't plex any more." ✅

docs/index.rst

@@ -11,6 +11,7 @@ Python wrappers for Chrome DevTools Protocol (CDP).
 
    overview
    getting_started
+   connection
    api
    develop
    changelog