feat: add affine global channel (#1762)

packages/workspace/src/atom.ts

@@ -0,0 +1,18 @@
+import type { WorkspaceFlavour } from '@affine/workspace/type';
+import { createStore } from 'jotai/index';
+import { atomWithStorage } from 'jotai/utils';
+
+export type JotaiWorkspace = {
+  id: string;
+  flavour: WorkspaceFlavour;
+};
+
+// root primitive atom that stores the list of workspaces which could be used in the app
+// if a workspace is not in this list, it should not be used in the app
+export const jotaiWorkspacesAtom = atomWithStorage<JotaiWorkspace[]>(
+  'jotai-workspaces',
+  []
+);
+
+// global jotai store, which is used to store all the atoms
+export const jotaiStore = createStore();