feat: add @claudemesh/sdk package for non-Claude-Code clients

Standalone TypeScript SDK that any process can use to join a mesh and
send/receive messages. Implements the same WS protocol and libsodium
crypto_box encryption as the CLI, with an EventEmitter-based API.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/connector-slack/tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "commonjs",
+    "lib": ["ES2022"],
+    "outDir": "dist",
+    "rootDir": "src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "dist"]
+}