test: add visual tests to donations

[NoamGaash]

Description

1. adds a test for the donation modal
2. adds a n aria attribute to the modal so it will be considered as a dialog

[github-actions]

Preview: https://s3.amazonaws.com/noam-gaash.co.il/11951077670/open-bus/157/index.html
Preview Storybook: https://s3.amazonaws.com/noam-gaash.co.il/11951077670/open-bus/157/storybook/index.html
Test Report (if available): 'https://s3.amazonaws.com/noam-gaash.co.il/11951077670/open-bus/aca220378333fdf5fb76b1b9d2ea0d0e5364cffe/test-results/index.html'

[NoamGaash]

Hi @YaelChen , would you like to review the code? tell me if there's something I can make more clear or readable, or if anything requires adding more comment or something like this