Adopt the convention that a Module's option path mirrors its directory
under modules/, with an index file naming the directory's own segment.
- Group agent Modules under modules.agents.*: claude-code (whole
directory), pi (flattened to a file), skills (renamed from
agent-skills), and gitea-axi under an agents/tools/ subgroup. The
agents/ and tools/ folders are pure namespace prefixes with no
aggregator enable.
- Nest hypridle and hyprlock under modules.desktop.hyprland.*, with
hyprland.nix as the index, and update the desktop aggregator.
- Remove the obsolete example Module.
- Record the convention in CONTEXT.md and ADR 0004, and update the
neogaia host, the two live CLAUDE.md gotchas, and the skills Module's
intentional Enable-convention exception comment.
