(feat)O3 2570: Use the new snackbar in patient chart(6 apps)

[jona42-ui]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
• My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
• My work includes tests or is validated by existing tests.

Summary

Added snackbar in the form-entry-app, patient-allergy, patient-appointment, patient-attachmnets-app, patient-chat-app, patient-flags

Screenshot for attachments-app

Related Issue

https://issues.openmrs.org/browse/O3-2570

Other

[hadijahkyampeire]

@jona42-ui how was this success message before the change, was it appearing with high contrast(black background)? Because we might need to change it to a low contrast(green background) since the designs expect success messages to be green. cc @denniskigen how should this be handled?

[hadijahkyampeire]

This looks good, thanks @jona42-ui , just a minor concern please confirm that the toast message I commented on was using high contrast before or not, and then do the appropriate implementation.

[jona42-ui]

This looks good, thanks @jona42-ui , just a minor concern please confirm that the toast message I commented on was using high contrast before or not, and then do the appropriate implementation.

cool!