[x] improving naming of c imports and bindings, increase type safety (wasm64 build should fail at compile time instead of unexpected pointer truncation)
[x] add span_tags to c imports and bindings (Fixes #141)
[x] convert observe api to single header bindings (Fixes #140)
[x] add observe api cpp bindings under namespace observe_api (Fixes #139)
[x] add Span class to observe api cpp bindings
Note: The observe api was never implemented in the js sdk.
observe_api(Fixes #139)Spanclass to observe api cpp bindingsNote: The observe api was never implemented in the js sdk.