Updating the changelog and readme to reflect the Tavus changes.

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added `TavusTransport`, a new transport implementation compatible with any 
+  Pipecat pipeline. When using the `TavusTransport`the Pipecat bot will 
+  connect in the same room as the Tavus Avatar and the user.
+
 - Added `UserBotLatencyLogObserver`. This is an observer that logs the latency
   between when the user stops speaking and when the bot starts speaking. This
   gives you an initial idea on how quickly the AI services respond.
@@ -80,6 +84,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- ⚠️Refactored the `TavusVideoService`, so it acts like a proxy, sending audio to 
+  Tavus and receiving both audio and video. This will make `TavusVideoService` usable
+  with any Pipecat pipeline and with any transport. This is a **breaking change**,
+  check the `examples/foundational/21a-tavus-layer-small-webrtc.py` to see how to
+  use it.
+
 - `DailyTransport` now uses custom microphone audio tracks instead of virtual
   microphones. Now, multiple Daily transports can be used in the same process.