v1.9.1 — runtime-agnostic fix (Hermes venv hardcode removed)

keelwright v1.9.1 — runtime-agnostic fix (remove Hermes venv hardcode)

Hotfix reported by the owner: the "universal" skill still referenced Hermes venv /
hardcoded Hermes paths as if universal — contradicting the runtime-agnostic mandate
that v1.7.1 started and v1.8.0 bindings completed.

What changed

• scripts/import_skill.py: HERMES_SKILLS → KEELWRIGHT_SKILLS; find_hermes_skills_dir()
  → find_skills_dir() now scans Hermes / OpenClaw / Cursor / Codex / Cline + neutral
  ~/.keelwright; default install path is now ~/.keelwright/skills (not AppData/Local/hermes).
• scripts/export_skill.py: default skill path → ~/.keelwright/skills/keelwright.
• references/bindings/python.md: "hermes venv" → "agent runtime venv".

Verification

• py_compile OK on both scripts.
• find_skills_dir() returns the neutral ~/.keelwright/skills default when no runtime
  path exists on disk (no longer assumes Hermes).
• No HERMES_SKILLS / find_hermes_skills_dir symbols remain in code.

This is the final cleanup so keelwright is genuinely runtime-neutral across Hermes,
OpenClaw, Cursor, Codex, Cline, and any venv-based agent.