Implement a basic area reclaim command

[Garanas]

Description of the proposed changes

Introduces an area-like reclaim command as a side effect to the standard reclaim command. Future iterations will allow the user to tweak (or disable) the behavior. The implementation is similar to an actual area reclaim command in BAR: the implementation attempts to add additional reclaim commands to props and/or structures that are similar to the entity that received the original reclaim command.

The behavior is at the moment:

• For units, all adjacent units of the same type
• For tree (groups), all other tree groups in a very small radius that overlap
• For rocks and wrecks, all other rocks and wrecks in a decent radius that overlap

adjacent-reclaim-05.mp4

Testing done on the proposed changes

Click around and issue reclaim orders.

Additional context

This is experimental.

Checklist

• Changes are annotated, including comments where useful