Improve graph layout to avoid overlapping visualization blocks

[SakshayMahna]

Description

Currently, some visualization blocks in LaunchMap (especially components inside group) may overlap in the canvas, making it harder to read large or complex launch files.

Suggested Improvement

Implement a layout strategy to automatically space out blocks so they don’t overlap. This would improve readability, especially for large graphs with many interconnected elements.

[SakshayMahna]

Checking with user who suggested this enhancement.