* feat(skills): add code-wiki skill — closes#486
Bundled skill at skills/software-development/code-wiki/ that generates
comprehensive documentation for any codebase: project overview, architecture
walkthrough with Mermaid flowchart, per-module deep-dives, class diagram,
sequence diagrams, getting-started guide, and (when applicable) API reference.
Output defaults to ~/.hermes/wikis/<repo-name>/ (external to repo, like
Google CodeWiki); in-repo output supported when user explicitly requests it.
Uses only existing Hermes tools (terminal, read_file, search_files,
write_file) — no Docker, no external services, no extra dependencies. Works
on local repos and GitHub URLs (shallow-clones to a temp dir). Bounded scope
defaults (depth 3, cap 10 modules) keep token cost reasonable on large repos.
* refactor(skills): move code-wiki to optional-skills
Per the 'when in doubt, optional' rule — wiki generation is a 'I want this
big thing right now' capability, not daily-driver behavior. Lines up with
finance/research/blockchain skills as install-on-demand rather than always
loaded.
Install via: hermes skills install official/software-development/code-wiki
