Add dependency catalog and svdep installation checker

[Copilot]

Catalogs all project dependencies and provides tooling to check whether svdep (SystemVerilog dependency manager) is installed.

Changes

• DEPENDENCIES.md: Complete dependency catalog documenting direct dependencies (sphinx, zuspec, myst-parser, sphinxcontrib-mermaid) and transitive dependencies from zuspec. Clarifies that svdep is an optional tool, not automatically installed, used for tracking SystemVerilog file dependencies in generated code.

• check_svdep.py: Executable script that checks for svdep installation across system Python and IVPM virtual environment. Reports status with clear indicators and provides installation instructions when not found.

• README.md / README_DEPENDENCIES.md: Project documentation and quick reference guide for dependency management, common commands, and troubleshooting.

Key Finding

svdep is not included by default. It's an optional PyPI package for SystemVerilog dependency tracking, useful when managing SV files generated by zuspec-be-sv.

# Check svdep status
python check_svdep.py

# Install if needed
./packages/python/bin/pip install svdep

Project uses IVPM for dependency management. Dependencies defined in ivpm.yaml, installed to ./packages/python/ via ivpm update.

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:

• github.com (HTTP Only)
  • Triggering command: /usr/bin/ssh /usr/bin/ssh -o SendEnv=GIT_PROTOCOL git@github.com git-upload-pack 'zuspec/zuspec.git' (packet 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)

Original prompt

Catalog the project dependencies. Check whether svdep is loaded

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