feat: Add nohoist for cozy-ui

We got issues during a test from cozy-viewer using cozy-client
useClient because :
- PdfMobileViewer from cozy-viewer calls useClient/withClient from
cozy-libs/packages/cozy-viewer/node-modules/cozy-client
- FileImageLoader from cozy-ui calls  useClient/withClient from
cozy-libs/node-modules/cozy-ui/node_modules/cozy-client

So the client was not accessible from FileImageLoader leading to an
error during tests.

We fix this by using the nohoist feature  for cozy-ui.

See https://classic.yarnpkg.com/blog/2018/02/15/nohoist/

package.json

@@ -39,7 +39,10 @@
       "./packages/commitlint-config-cozy"
     ]
   },
-  "workspaces": [
-    "packages/*"
-  ]
+  "workspaces": {
+    "packages": [
+      "packages/*"
+    ],
+    "nohoist": ["**/cozy-ui"]
+  }
 }