[GH-971-969] - Increase wall colliders and fix items not spawning inside the square

[tvillegas98]

Motivation

Having an square walls, is causing some troubles with things that could appear beyond these walls

Closes #971
Closes #969

Summary of changes

• Increased map radius size
• Increased external walls size (almost duplicataed)
• Added an square wall field to map configurations

How to test it?

• Play the game and check that the items spawns inside the square (you'll have to print the random position created in random_position_in_square/5 and check that they don't go over the walls)
• Check that valtimer is not able to go trough the external walls

Checklist

• Tested the changes locally.
• Reviewed the changes on GitHub, line by line.
• This change requires new documentation.
  • Documentation has been added/updated.

[Nico-Sanchez]

LGTM! Just a minor comment