Long path issues on Windows

[lilleyse]

We enable long path support in Conan here but it frequently breaks @weegeekps build and has other issues (see #124 (comment))

One reason for enabling long paths in the first place was to produce a single .conan directory that we can easily cache on CI. Some more details on that here.

Two options:

• We could disable long paths everywhere and make sure to cache two directories on CI
• Or we could keep long paths enabled on CI but disabled for local development

[lilleyse]

More recently Ninja has been the problem. If cesium-omniverse has too long a path then Ninja will fail to build draco in cesium-native. Ninja has a 260 character path limit on Windows.

See https://gitlab.kitware.com/cmake/cmake/-/issues/22435 and ninja-build/ninja#1900

[lilleyse]

The ninja 260 character path limit seems to have been fixed: ninja-build/ninja#1900