3DBlox: Check region connectivity

[osamahammad21]

Description

Add a linter check to validate that connected regions in a 3DBlox design geometrically intersect as intended.
For any region-to-region connection defined in the 3DBlox connectivity description, the corresponding regions must overlap or intersect in physical space.

Suggested Solution

No response

Additional Context

You can find the linter code in src/odb/src/3dblox/checker.cpp.
Note how the unfolded view of the chiplets is constructed and use the same idea for regions.