feat(brains): createFromProject high-level helper (#182)

[rrader26]

Part B of #182 (SDK helper). Pairs with the memory_create_brain MCP tool in memory-thinkfleet (Part A).

What

Adds BrainsResource.createFromProject(opts) — the easy, high-level path to turning a project's memory into a brain:

const brain = await tf.brains.createFromProject({
  externalId: 'my-support-playbook',
  name: 'Support Playbook',
  domain: 'support',
})
// brain.status === 'DRAFT', brain.visibility === 'PRIVATE'
await tf.brains.update(brain.id, { visibility: 'PUBLIC', status: 'PUBLISHED' })

• Takes { externalId, name, domain?, version?, visibility? } (CreateBrainFromProjectOptions).
• Builds a sensible CreateBrainRequest with an empty-but-valid Brain Card (empty provenance + empty coverage) and calls the low-level create — which is left untouched.
• Defaults version 1.0.0, visibility PRIVATE. Not published.
• Server recomputes coverage from the project's memory (see caveat below).

Also adds BrainReasoningCoverage and card.coverage.reasoning to the SDK's BrainCard type, keeping the Brain Card in step with the server surface. New types exported from the package root.

Note

The current REST POST /brains handler stores card verbatim and does not recompute coverage — only the new memory_create_brain MCP tool does. So over REST the empty coverage is stored as-is until a server-side recompute lands on that route. The helper still sends the empty-but-valid card as the issue specifies.

Checks

npm run typecheck → clean. npm run build → success (CJS/ESM/DTS).

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