Build Problem: any.hpp missing

## Bug Report

### Build Problem

```
In file included from ./OpenTimelineIO/src/opentimelineio/anyDictionary.h:6,
from ./OpenTimelineIO/src/opentimelineio/serializableObject.h:9,
from ./OpenTimelineIO/src/opentimelineio/serializableObjectWithMetadata.h:6,
from ./OpenTimelineIO/src/opentimelineio/composable.h:6,
from ./OpenTimelineIO/src/opentimelineio/item.h:7,
from ./OpenTimelineIO/src/opentimelineio/clip.h:6,
from ./OpenTimelineIO/src/opentimelineio/clip.cpp:4:
./OpenTimelineIO/src/opentimelineio/any.h:6:10: fatal error: any/any.hpp: No such file or directory
6 | #include "any/any.hpp"
| ^~~~~~~~~~~~~
compilation terminated.
In file included from ./OpenTimelineIO/src/opentimelineio/anyDictionary.h:6,
from ./OpenTimelineIO/src/opentimelineio/serializableObject.h:9,
from ./OpenTimelineIO/src/opentimelineio/serializableObjectWithMetadata.h:6,
from ./OpenTimelineIO/src/opentimelineio/composable.h:6,
from ./OpenTimelineIO/src/opentimelineio/composable.cpp:4:
./OpenTimelineIO/src/opentimelineio/any.h:6:10: fatal error: any/any.hpp: No such file or directory
6 | #include "any/any.hpp"
| ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/opentimelineio/CMakeFiles/opentimelineio.dir/build.make:76: src/opentimelineio/CMakeFiles/opentimelineio.dir/clip.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from ./OpenTimelineIO/src/opentimelineio/anyDictionary.h:6,
from ./OpenTimelineIO/src/opentimelineio/serializableObject.h:9,
from ./OpenTimelineIO/src/opentimelineio/deserialization.cpp:7:
./OpenTimelineIO/src/opentimelineio/any.h:6:10: fatal error: any/any.hpp: No such file or directory
6 | #include "any/any.hpp"
| ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/opentimelineio/CMakeFiles/opentimelineio.dir/build.make:90: src/opentimelineio/CMakeFiles/opentimelineio.dir/composable.cpp.o] Error 1
make[2]: *** [src/opentimelineio/CMakeFiles/opentimelineio.dir/build.make:118: src/opentimelineio/CMakeFiles/opentimelineio.dir/deserialization.cpp.o] Error 1
In file included from ./OpenTimelineIO/src/opentimelineio/anyDictionary.h:6,
from ./OpenTimelineIO/src/opentimelineio/serializableObject.h:9,
from ./OpenTimelineIO/src/opentimelineio/serializableObjectWithMetadata.h:6,
from ./OpenTimelineIO/src/opentimelineio/effect.h:6,
from ./OpenTimelineIO/src/opentimelineio/effect.cpp:4:
./OpenTimelineIO/src/opentimelineio/any.h:6:10: fatal error: any/any.hpp: No such file or directory
6 | #include "any/any.hpp"
| ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/opentimelineio/CMakeFiles/opentimelineio.dir/build.make:132: src/opentimelineio/CMakeFiles/opentimelineio.dir/effect.cpp.o] Error 1
In file included from ./OpenTimelineIO/src/opentimelineio/anyDictionary.h:6,
from ./OpenTimelineIO/src/opentimelineio/serializableObject.h:9,
from ./OpenTimelineIO/src/opentimelineio/serializableObjectWithMetadata.h:6,
from ./OpenTimelineIO/src/opentimelineio/composable.h:6,
from ./OpenTimelineIO/src/opentimelineio/item.h:7,
from ./OpenTimelineIO/src/opentimelineio/composition.h:6,
from ./OpenTimelineIO/src/opentimelineio/composition.cpp:4:
./OpenTimelineIO/src/opentimelineio/any.h:6:10: fatal error: any/any.hpp: No such file or directory
6 | #include "any/any.hpp"
| ^~~~~~~~~~~~~
compilation terminated.
```

## To Reproduce

1. ArchLinux
2. Python 3.10 (sic)
4. git master
5. gcc 13.2.1

submodules initiated

Start by reproducing the ArchLinux build failure and inspect src/opentimelineio/any.h, which includes any/any.hpp, along with the repository's dependency and build configuration. Confirm how the any.hpp dependency is expected to be provided, then verify that a clean build completes without the missing-header errors.

Written by the indexing model from the issue text.