B1: generalize amico-run into the amico CLI (verb router)

[aarontrowbridge]

What this does

Introduces the amico verb-router surface generalizing amico-run — the foundation slice of the depth-1 tool-spine (issue #108, spec-20260708-112732 §7.3, plan-20260708-214610 slice B1). Non-destructive: no package rename, no removed behavior, no bookkeeping migrated.

The seam

• src/launch.ts — the amico-run launch body, extracted verbatim from cli.ts (main → launch, self-invocation removed). cli.ts is now a thin amico-run bin wrapper importing it. This is the single delegation point: both the amico-run bin and the new amico run verb call the SAME launch path, so there is no behavior fork and the existing amico-run suite still exercises the real bodies.
• src/amico.ts — the verb router (new amico bin).
  • run / resolve / sandbox delegate verbatim: amico <verb> <args> ≡ amico-run <equivalent-args>.
  • amico --help lists the full verb surface; unknown verb → exit 64; bare amico → usage + exit 64.
• src/verbs.ts — the shared-spine bookkeeping verbs (catalog, vault, device, note) as clearly-marked B1 stubs: each prints its intent, the real module it will generalize, and the slice that lands the body, then exits 0. No bookkeeping logic migrated — that is B2/B3/B5.
• src/mcp_serve.ts — the optional MCP facade over the same verbs. Stub seam only: --list renders the verb↔tool mapping; the transport carries zero MCP SDK dependency, keeping it inside the test/s31.test.ts "no MCP in the orchestrator" guard. Landing the real transport will require an explicit, reviewed S31 amendment — exactly as spec C amended the S31 SolveSpec ban to name amico-run the launch gate.
• Build/packaging: esbuild.config.mjs now emits both dist/amico-run.js and dist/amico.js; package.json adds the amico bin; launcher/amico mirrors launcher/amico-run.

Tests

test/amico.test.ts (14 new tests) covers the router seam: --help surface, unknown-verb → 64, verbatim run/resolve/sandbox delegation (reusing the existing fixtures), the four stub verbs, and the mcp-serve facade (--list + no-flag).

Test Files  17 passed (17)
     Tests  120 passed (120)     # 106 pre-existing + 14 new router tests

Full suite green; tsc --noEmit clean. (Julia-gated test/slow/** not run — needs AMICO_TEST_JULIA_PROJECT per AGENTS.md.)

Acceptance criteria (#108)

• amico <verb> dispatch routes run/resolve/sandbox verbatim to existing amico-run behavior
• spine-verb + mcp-serve seams present (stubs this slice)
• existing amico-run test suite stays green

Notes for review

• Stands on the depth-1 spec gate decisions just recorded on B0 (decision, Jack): ratify depth-1 redesign gates G-1/G-8/G-9 #107 (B0 ratification, G-9).
• The fork's CI may be RED due to the pre-existing private-fork vendored-binary token issue (CI can't fetch the vendored opencode binary from the private fork). That is unrelated to this change — it touches only packages/amico-run (bun/pnpm TS), no opencode/vendor surface.

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