feat(nbstore): init (#7639)

TODO

- [x] basic
- [x] storages
- [x] producer/consumer
- [x] operation pattern
- [x] events
- [x] worker
- [x] readme
- [x] peer dependencies

packages/common/nbstore/src/connection/shared-connection.ts

@@ -0,0 +1,22 @@
+import type { Connection } from './connection';
+
+const CONNECTIONS: Map<string, Connection<any>> = new Map();
+export function share<T extends Connection<any>>(conn: T): T {
+  if (!conn.shareId) {
+    throw new Error(
+      `Connection ${conn.constructor.name} is not shareable.\nIf you want to make it shareable, please override [shareId].`
+    );
+  }
+
+  const existing = CONNECTIONS.get(conn.shareId);
+
+  if (existing) {
+    existing.ref();
+    return existing as T;
+  }
+
+  CONNECTIONS.set(conn.shareId, conn);
+  conn.ref();
+
+  return conn;
+}