Add toast component

[Chaoyingz]

fixes #23.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.85%. Comparing base (16abe6a) to head (ac40c31).
Report is 3 commits behind head on main.

❗ Current head ac40c31 differs from pull request most recent head 9436375. Consider uploading reports for the commit 9436375 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #109       +/-   ##
===========================================
- Coverage   95.68%   83.85%   -11.83%     
===========================================
  Files          14       10        -4     
  Lines         950      669      -281     
===========================================
- Hits          909      561      -348     
- Misses         41      108       +67     

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[Chaoyingz]

looks like this:

Please let me know if there are any issues that need fixing or areas for improvement.

[samuelcolvin]

Looks great, thank you so much.

Just conflicts need fixing.

So sorry for the long delay.

[Chaoyingz]

Conflicts fixed.

[sydney-runkle]

Approving, thanks for resolving conflicts. This is a great feature addition!