Empty lib + serve_stdio entry that bails until Task 3 wires rmcp. Adds
rmcp 1.6 to workspace dependencies (server + macros + transport-io +
schemars features) + tokio multi-thread/io-util/io-std local extensions.
schemars declared as "1" (resolved to 1.2.1) — matches rmcp 1.6's ^1.0
requirement (verified via crates.io /dependencies; plan literal was 0.9
which would conflict). Path-style refs for kebab-app / kebab-config /
kebab-core follow workspace convention.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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