Add run_palace and combine_snp wrapper scripts for gds2palace integration

[Copilot]

The gds2palace workflow auto-generates a run_sim script calling run_palace and combine_snp, but neither script was provided anywhere in the IIC-OSIC-TOOLS environment, causing immediate command not found failures when running any gds2palace simulation.

Changes

• _build/images/palace/scripts/run_palace — bash wrapper around the palace binary; supports optional -np N for MPI parallelism
• _build/images/palace/scripts/combine_snp — bash wrapper that invokes combine_extend_snp.py via readlink -f so it resolves correctly when called through the ${TOOLS}/bin/ symlink
• _build/images/palace/scripts/combine_extend_snp.py — Python post-processor (adapted from gds2palace_ihp_sg13g2/scripts) that walks the output tree for port-S.csv (Palace) or scalar_results.names (Elmer), assembles the full S-matrix, writes Touchstone .snp, and optionally performs DC extrapolation and port de-embedding via scikit-rf
• _build/images/palace/scripts/install.sh — installs the above to ${TOOLS}/palace/bin/ and ${TOOLS}/palace/lib/; the existing install_links.sh auto-symlinks ${TOOLS}/*/bin/* → ${TOOLS}/bin/, so both scripts land in PATH without further changes

Notes on the gmsh display errors

The Could not generate display lists / XRequest.148: BadValue errors visible in the screenshots are cosmetic X11/OpenGL warnings from gmsh's FLTK window under LIBGL_ALWAYS_INDIRECT=1 (set by start_x.sh in WSL mode). The mesh is generated and written successfully. Users can suppress the GUI entirely with settings['no_gui'] = True in their simulation script, or switch to VNC mode.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/VolkerMuehlhaus/gds2palace_ihp_sg13g2/contents/
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/VolkerMuehlhaus/gds2palace_ihp_sg13g2/contents/workflow
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/VolkerMuehlhaus/gds2palace_ihp_sg13g2/contents/workflow/scripts
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/awslabs/palace/commits/e72ad3b6aa8af6fc7a9e08a5cb1b387cc3c8beba
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/awslabs/palace/contents/
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/awslabs/palace/contents/scripts
  • Triggering command: /usr/bin/curl curl -s REDACTED conntrack --ctstate INVALID,NEW -j DROP (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)