fix: donation modal text dark mode

[LeoBonjo]

Extended dark mode theme to be consumable by donation modal components; wrapped in index.tsx in and imported them into DonateModal and DonationButton. The text now correctly changes color to white in dark mode.

[github-actions]

Preview: https://s3.amazonaws.com/noam-gaash.co.il/11899107300/open-bus/151/index.html
Preview Storybook: https://s3.amazonaws.com/noam-gaash.co.il/11899107300/open-bus/151/storybook/index.html
Test Report (if available): 'https://s3.amazonaws.com/noam-gaash.co.il/11899107300/open-bus/a24806a2517c93b58c101ad8a7b6425187eda13c/test-results/index.html'

[NoamGaash]

Thank you! It's working and it improves DataBus, so it can be merged. However there are few suggestions that if you have the time I'd appreciate if you'll consider making the research about so the code will be a little cleaner

Thank you!