Unify the AlignFirst tooling into one `alignfirst` CLI

[paleo]

Replace alcode, alproject, plans-share and the content of the alignfirst skill with one globally installed CLI, @paleo/alignfirst, and embed docmap in it.

Commands

alignfirst guide [protocol]     # core guide, or core guide + one protocol; --protocol-only drops the core
alignfirst ticket <id>          # resolve TASK_DIR, restore from _archives, list entries
alignfirst ticket --side        # reserve the next side-N
alignfirst sync                 # synchronize the team plans repository
alignfirst plans <subcommand>   # setup, check, archive
alignfirst docmap [...]         # the docmap CLI, unchanged
alignfirst project <subcommand> # discover and manage local projects
alignfirst code <subcommand>    # alcode, gated by ALIGNFIRST_CODE_AGENT
alignfirst doctor               # versions, plans mode, manifest, skills, agent config

Key points

• The eight skills become stubs that run alignfirst guide <protocol>; slash commands and model triggers stay in the skills.
• guide renders the protocols for the current project. guide review --reviewer <perspective> [--module <name>...] composes a reviewer subagent's prompt, replacing the file paths the orchestrator hands over today.
• ticket replaces the three implementations of the .plans layout: the skill prose, alcode's side tickets, plans-share's archives.
• A committed .alignfirst.json holds portable project facts: ticketPattern, plans.folder, portRange. It also marks the project for project discovery. A required .alignfirst-projects.json marks each projects directory, carries its description and port range, and bounds the scan; it replaces ~/.alproject.json and alproject-guide.md.
• .plans stays a symlink into the team plans clone. @paleo/workspace stays the only project devDependency.
• Tool manuals keep their --guide flag: alignfirst code --guide, alignfirst docmap --guide.
• The existing bins remain as compatibility aliases during the migration.