feat: Add eSim to OpenROAD physical design bridge and GUI integration

[Divinesoumyadip]

Purpose :
This PR introduces the necessary infrastructure to connect eSim's schematic capture and netlist generation directly to OpenROAD's physical design flow. Currently, eSim does not have an automated pathway to take a schematic all the way to a physical GDSII layout. This feature bridges that gap, allowing users to trigger an automated RTL-to-GDSII pipeline directly from the eSim environment.
Approach :
Added an "OpenROAD-GDSII" execution button to the eSim frontend workspace. The backend bridge automatically captures the active eSim project directory, ensuring the physical design flow operates on the correct user workspace. Created a translation script that scans eSim-generated Spice netlists (.cir.out), sanitizes the net names to comply with Verilog IEEE 1364-2005 standards, and generates an OpenROAD-compatible structural Verilog file.Outputs a mapping.json file to preserve the translation table between eSim's logical nets and the physical Verilog wires used by OpenROAD.