Changes since last release

Build updates to allow installing code-gen scripts and anari_viewer without needing to use them in the build
Add new helium smart pointer type (ChangeObserverPtr) to automatically manage object observers
Add support in helide for ANARI_KHR_FRAME_COMPLETION_CALLBACK
Sync size of ANARI_BOOL to be 1 byte instead of 4 to match latest spec revision
Add glTF and KTX support to anariViewer
Minor updates to anari_cpp headers to be more consistent
Fix various bugs in code gen, python bindings, and examples

PRs

Helium commit observer generalizations by @jeffamstutz in #192
ensure correct usage of C++ bool in accordance with ANARI spec by @jeffamstutz in #194
fix issue in helium where all objects emitted messages as ANARI_OBJECT by @jeffamstutz in #195
support KHR_FRAME_COMPLETION_CALLBACK in helide by @jeffamstutz in #196
Added python bindings install option and some windows fixes by @kvankooten in #197
update code_gen targets, regenerate devices, update baseline json by @jeffamstutz in #198
initialize ANARI before window is spawned in example viewer by @jeffamstutz in #199
generalize per-frame app callbacks methods in anari_viewer by @jeffamstutz in #201
Support glTF + KTX in viewer by @jeffamstutz in #202
enable installing targets that may not be built locally by @jeffamstutz in #203
misc v0.10.0 release updates by @jeffamstutz in #204

Full Changelog: v0.9.1...v0.10.0