Add `Debug` implementation with clippy

[tcoratger]

In circumstances like cairo_native, and other projects working on Cairo and its compilation, it is extremely useful to have a Debug implementation for each public structure and enum.

Therefore, the lint MISSING_DEBUG_IMPLEMENTATIONS is added with a derivation of Debug wherever possible, along with an allow attribute when the implementation is more complex.

This allows for the implementation of Debug for a large number of new objects that did not previously have this implementation, with the potential for further refinement in the future.

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This change is