Changes

Summary

1. Fixing the skip (details)
2. Adding TFFIBackend for UFFI and adding tests. (details)
3. Adding the pointers to be returned as an struct directly, if it is a pointer to an struct. (details)
4. Adding missing return (details)
5. Keeping the structs pointers in a callback as ExternalAddresses (details)
6. Fixing mapping of structs (details)
7. Adding hook extension so libraries can use it.... cof cof LibGit (details)
8. Adding backend support to FFI (details)
9. Refactoring in the calling method (details)
10. merged changes included in pharo9 (details)

Fixing the skip

Adding TFFIBackend for UFFI and adding tests.

Adding the pointers to be returned as an struct directly, if it is a pointer to an struct.

Adding missing return

Keeping the structs pointers in a callback as ExternalAddresses

Fixing mapping of structs

Adding hook extension so libraries can use it.... cof cof LibGit

Adding backend support to FFI

Refactoring in the calling method

merged changes included in pharo9