When the user invokes /paseo-advisor with another skill reference
(/unslop, /unslop-risk, $diagnose, etc.), the orchestrator should
instruct the advisor to load and invoke that skill against the current
task before doing anything else.
Skills installed via Paseo desktop never updated after first run, so
users were stuck on already-fixed skill content. On every launch, if
the paseo base skill is present in `~/.agents/skills/`, sync each
bundled skill (incl. `references/`) into agents, claude (via symlink/
junction), and codex — overwriting only files whose content differs.
Files on disk that are not in the bundle are left alone; deprecation
goes through tombstones (e.g. `paseo-orchestrate` redirects to
`paseo-epic`).
Also refreshes the bundled skill set: drops `paseo-chat`, adds
`paseo-advisor` and `paseo-epic`, and turns `paseo-orchestrate` into
a tombstone redirecting to `paseo-epic`.
Adds a desktop test job to CI on Ubuntu and Windows so the
junction/symlink path is exercised on both platforms.
