Adds support for infinite and free_infinite layouts and some related binds and config parameters

[patrick-nonedev]

infinite-canvas.md

Summary

This PR introduces two new infinite canvas layouts:

• infinite: a rigid infinite canvas where windows are attracted toward the monitor center while avoiding collisions.
• free_infinite: a free-form infinite canvas where windows preserve their position and do not interact.

Features

• Added support for scrolling the canvas in all four directions.
• Added helpers to center the canvas on either the focused window or the centroid of all visible windows.
• Automatic follow-focus centering when switching focus on infinite layouts.
• Added the new_window_scale configuration option to control the initial size of newly created windows.
• Updated resize() to skip monitor bounds on infinite layouts, allowing windows to exist anywhere on the canvas.
• Added documentation for the new layouts, configuration options, keybindings, and a complete configuration example.

Example configuration

# Infinite canvas layouts
bind=SUPER+SHIFT,i,setlayout,infinite
bind=SUPER+ALT,i,setlayout,free_infinite

# Canvas navigation
bind=SUPER+CTRL+ALT,l,scroll_left
bind=SUPER+CTRL+ALT,h,scroll_right
bind=SUPER+CTRL+ALT,j,scroll_up
bind=SUPER+CTRL+ALT,k,scroll_down

# Canvas helpers
bind=SUPER+CTRL+ALT,Down,home_canvas_wrapper
bind=SUPER+CTRL,Left,center_focused_wrapper

# Optional: scale newly created windows
new_window_scale = 0.75

Notes

This is my first contribution to Mango, so I'd really appreciate any feedback or suggestions. Thanks for taking the time to review it!