Node native linked modules

[avaer]

For mobile platforms (Magic Leap/Android), we use a native module linking technique hacked into node: https://github.com/exokitxr/node-exokit/pull/2/files#diff-fe81db3367fed3e4e9a60df5d1a24d5bR211

However, it turns out that node can natively support this case: https://github.com/nodejs/node/blob/3d0a309fa023c50a72652229082553cfbdfe7047/src/node.h#L599

We should move to that model rather than maintaining an incompatible one ourselves.