find: document that the command contacts a remote ranking service #72

Observation on main faf1d88

deckuse find ranks document elements through @typesafe-ai/sdk (src/find/client.ts, src/find/rank.ts; see also #53, "release the workspace write lock before remote ranking"). The README describes Deckuse as local-first and does not mention TypeSafe, the network, or what is sent.

Impact

Users who choose Deckuse because documents stay on their machine have no way to learn from the README that one read command sends data to a third-party service. An agent may pick find over search without the user knowing.

Acceptance

• README and deckuse find --help state that the command makes a network request, what content leaves the machine (query only, or element text as well), and which credential it needs.
• agent-context / the skill mark find as network-dependent and name search / list as the offline alternative.
• Consider an environment switch that disables network commands so restricted hosts fail with a structured error.