Player / Energy conflicts management

[d-plaindoux]

Add a conflict management:

• Isolate messages in Protocol objects
• A player can kill another one if its weight is the greatest
• A killed player is replaced by an energy entity
• A player can consume an energy entity
• An energy notify the region when it's consumed

With this approach a player can:

• kill another one,
• consume an energy slot or
• move.

With such design, we cannot lose energy since states are managed seamlessly respecting the actor approach.

The conflict management relies on distributed resources. Therefore the multi-region implementation is compliant with this approach.

[d-plaindoux]

This conflict management is not compatible with multiple regions since eaten actors are done locally without messages and notifications.

[NotBad4U]

I put some comments but everything is LGTM for me. All the /doc are up to date with this PR ? Nothing has change in the /doc so I wonder if its normal or not.

[NotBad4U]

LGTM thx for the doc