c#: Implement IList<T> to Eina.List.

c#: Implement IList<T> to Eina.List.

Summary:
Container can have three configuration over `Own` and `OwnContent`:
`Own = true` and `OwnContent = true`;
`Own = true` and `OwnContent = false`;
`Own = false`and `OwnContent = false;
If someone try to instanciate the container with `Own = false` and `OwnContent = true`, a exception raises.

There is two Ownerships' behaviours in c#, where `IsReadOnly` is responsible and `IsReadOnly = !OwnContent`:
Full Ownership: User can use modify/Add/Remove operations over the container, this is implemented with `OwnContent = true`.
No Ownership: User **cannot** use modify/Add/Remove operations, this is implemented with `OwnContent = false`.

For the memory, `Own` frees the node, while `OwnContent` frees the data portion.
ref T8487

Reviewers: lauromoura, felipealmeida, YOhoho, segfaultxavi, jptiz

Reviewed By: lauromoura

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Maniphest Tasks: T8487

Differential Revision: https://phab.enlightenment.org/D10742