Move the RedSkills root from ~/.red-skills to ~/.red/skills

[filipeforattini]

Maintainer proposal. ~/.red-skills is the one RedDB state root that sits outside the ~/.red/ house.

What is already inside ~/.red/

Read from a provisioned machine:

~/.red/config.yaml
~/.red/redskilled/     the host-scoped execution daemon (bundles, credentials, projects, state)
~/.red/redcode/
~/.red/state/
~/.red/tmp/

And on the Windows side, the shared managed root is .../.red/dev/config. ~/.red-skills is the outlier, and it is the one people and tools most often have to name.

What the move touches

It is not a rename in one repo:

Repo	References to .red-skills
red-dev (src/)	~154
red-skills	~35, including scripts/install.sh

Both write the tree, so a one-sided change splits the machine — see #229 for what happens when two writers disagree about one pointer. Existing machines also carry sets/, versions/, cache/, package-set.json and a live current that other things resolve through: the Claude marketplace is registered as a directory source at ~/.red-skills/current, PATH carries ~/.red-skills/current/plugins/*/bin, and the systemd unit for redskilled references bundles under ~/.red/redskilled/bundles.

What a real plan needs

• A coordinated release across red-dev and red-skills; neither can land alone.
• Migration of an existing ~/.red-skills, including re-registering the marketplace directory source and refreshing PATH entries, since a stale registration is exactly the Two owners write ~/.red-skills/current, and the standalone installer's target has no plugins/ #229 failure.
• A period where both roots resolve, so a machine mid-upgrade is never broken.
• A decision on whether ~/.red-skills becomes a symlink to the new root permanently or only through a deprecation window.

Suggested order

Land #229, #230 and #231 first. Those give the converge a single owner for the pointer, a check that the pointer matches the recorded set, and honest failure reporting — which is the machinery a path migration has to lean on. Migrating a pointer that two owners still fight over, with failures still swallowed, would break in new and quieter ways.