docs: finish codename rename in README and CMake label

The Python package and track_core namespace stay as-is by design.

CMakeLists.txt

@@ -29,7 +29,7 @@ else()
     target_compile_features(track_core PUBLIC cxx_std_23)
 
     option(TRACK_CORE_BUILD_PYTHON "Build Python bindings" OFF)
-    option(TRACK_CORE_BUILD_TESTS "Build track-core tests" ON)
+    option(TRACK_CORE_BUILD_TESTS "Build chataway tests" ON)
 
     if(TRACK_CORE_BUILD_PYTHON)
         find_package(Python 3.9 COMPONENTS Interpreter Development.Module REQUIRED)

README.md

@@ -1,4 +1,4 @@
-# track-core
+# chataway
 
 Standalone C++ core for mcwhirter track simulation and strip rendering.
 
@@ -17,7 +17,7 @@ cmake --build build
 ctest --test-dir build --output-on-failure
 ```
 
-When used inside an ESP-IDF project under `components/track-core`, the same
+When used inside an ESP-IDF project under `components/chataway`, the same
 `CMakeLists.txt` registers an IDF component for the portable core only.
 
 ## Python bindings