Use ToastMessages from frontend-shared

[acelaya]

Depends on #5876

Replace local copy of ToastMessages with the one from frontend-shared

Testing steps

Go to http://localhost:3000 and check toast messages look the same.

[codecov]

Codecov Report

Merging #5884 (07216bf) into main (64ff836) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 07216bf differs from pull request most recent head f2e9809. Consider uploading reports for the commit f2e9809 to get more accurate results

@@            Coverage Diff             @@
##             main    #5884      +/-   ##
==========================================
- Coverage   99.44%   99.44%   -0.01%     
==========================================
  Files         258      257       -1     
  Lines        9926     9874      -52     
  Branches     2372     2359      -13     
==========================================
- Hits         9871     9819      -52     
  Misses         55       55              

Files	Coverage Δ
src/annotator/components/ToastMessages.tsx	100.00% <ø> (ø)
src/annotator/sidebar.tsx	98.59% <ø> (ø)
...debar/components/ShareDialog/ExportAnnotations.tsx	100.00% <100.00%> (ø)
...debar/components/ShareDialog/ImportAnnotations.tsx	100.00% <100.00%> (ø)
...components/ShareDialog/UserAnnotationsListItem.tsx	100.00% <100.00%> (ø)
src/sidebar/components/ToastMessages.tsx	100.00% <ø> (ø)
src/sidebar/services/frame-sync.ts	99.06% <ø> (ø)
src/sidebar/services/toast-messenger.ts	100.00% <ø> (ø)
src/sidebar/store/modules/toast-messages.ts	100.00% <ø> (ø)

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