🛠 [fix] Inline lib functions into install.sh to fix bootstrap sourcing

[Copilot]

install.sh is the curl-pipe bootstrap script — it runs before the repo is cloned, so sourcing lib/log.sh and lib/distro.sh by path always fails on a fresh machine.

Changes

• Removed SCRIPT_DIR derivation and both . "$SCRIPT_DIR/lib/*.sh" source calls
• Inlined the minimal logging surface (_log_use_color, _log_fmt_prefix, _log_print, log_info, log_warn, log_error) from lib/log.sh
• Inlined distro() OS detection from lib/distro.sh

All inlined code is verbatim from the originals — no behavioral changes.

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:

• dl.google.com
  • Triggering command: /usr/lib/apt/methods/https /usr/lib/apt/methods/https (dns 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)