moonshot tools: add jnlp console link generator, cart monitoring scripts, and shared lib

[aerickson]

Includes:

• moonshot_jnlp.py — New script to generate iLO JNLP console links (Java IRC) directly without going through the web UI
• moonshot_jnlp_notes.md — Notes documenting JNLP internals (port formula, hardcoded values, auth flow)
• moonshot_lib.py — Shared library with common Moonshot utilities (cart/node hostname parsing, iLO interaction, etc.)
• keep_moonshot_carts_up.py — New script (~535 lines) to monitor and recover Moonshot carts
• keep_moonshot_carts_up.md — Docs for the above script
• reset_moonshot.py — New script to reset individual Moonshot nodes
• moonshot_ilo_url.py — Script to generate iLO URLs
• ms_javaws_runner — Updated to handle new exception list requirement
• reset_moonshot_and_pxe_boot.py — Refactored (~41 line reduction)
• Tests — New test files covering moonshot_lib and keep_moonshot_carts_up (~390 lines total)
• Project config — Added pyproject.toml, uv.lock, .python-version, .claude/settings.local.json
• ubuntu-autoinstall/README.md — New README for ubuntu-autoinstall scripts
• File reorganization — Several scripts moved into moonshot/ directory