[Feature] Rendering boundaries in dimension-limited environments

[Giovannibriglia]

Description:

• Issue Reference: #134
• Summary: Introduced a feature to visualize boundaries in dimension-limited environments by displaying a rectangle. This visualization is triggered when both x_semidim and y_semidim parameters are defined and have non-None values.
• This addition enhances the usability of the simulator in dimension-limited scenarios by providing a clear visual cue for the environment's boundaries.

Changes Made:

• [environment.py]: added code to render a rectangle based on the x_semidim and y_semidim parameters. The visualization will only appear when both parameters are defined and set to specific values.

[Giovannibriglia]

I reforked the repo, therefore the pull request has been closed :/. I will reopen it once I’m ready to continue.