refactor(core): adjust core struct (#8218)

packages/frontend/core/src

hooks -> components/hooks
atoms -> components/atoms
layouts -> components/layouts
providers -> components/providers
mixpanel -> @affine/track
~~shared~~
~~unexpected-application-state~~

tsconfig.json

@@ -94,6 +94,9 @@
     {
       "path": "./packages/frontend/core"
     },
+    {
+      "path": "./packages/frontend/track"
+    },
     {
       "path": "./packages/frontend/apps/web"
     },