Ship OpenFleet contracts and the OpenWall draft proposal (#177)

* feat: add OpenFleet membership and CoinPay rental contracts

* Propose OpenWall broadcasts and direct messaging contracts

* release: prepare OpenFleet and OpenWall public contracts

* fix: use tested npm for compatible CLI installs

packages/sdk/README.md

@@ -0,0 +1,34 @@
+# @logicsrc/sdk
+
+LogicSRC contract types and constructors for tasks, AgentSwarm sessions and
+OpenFleet descriptors. These helpers construct documents; they do not start
+agents, resolve remote identities or initiate payments.
+
+```sh
+npm install @logicsrc/sdk @logicsrc/validators
+```
+
+```ts
+import { createOpenFleet } from "@logicsrc/sdk";
+import { validate } from "@logicsrc/validators";
+
+const fleet = createOpenFleet({
+  id: "https://example.com/fleets/research",
+  name: "Research",
+  owner_did: "operator.coinpay",
+  members: [{
+    kind: "openagent",
+    id: "analyst.coinpay",
+    url: "https://example.com/agents/analyst.json"
+  }]
+});
+
+const result = validate("openfleet", fleet);
+if (!result.ok) throw new Error(JSON.stringify(result.errors));
+```
+
+Use `@logicsrc/validators` 0.1.1 or newer for OpenFleet validation. See the
+[OpenFleet specification](https://logicsrc.com/docs/openfleet) for member
+bindings, exact decimal rental rates and CoinPay settlement metadata.
+
+MIT © Profullstack, Inc.