This mod lets you move your player character with the mouse, instead of using the WASD keys.
The way it works, is when you trigger the move custom command (default: Mouse 3, aka clicking the scroll wheel), the mod generates a capsule in your cursor.
When the capsule is used, it can read the target position, and move the player character there.
Works with vehicles too, and even with trains (sorta).
You can toggle the move modes in the player mod settings (Settings -> Mod settings -> Per player -> Move with the Mouse).