[chore] Push notification grouping

[Vangaorth]

Short description

This PR groups the push-notification's related files into features/pushNotifications.

List of changes proposed in this pull request

• All files directly related to the handling of push notifications have been moved under features/pushNotifications
• Removed default exports in favour or direct ones
• Profile's push notification screens have been left under the profile folders, since they are attributes of the profile and the user preferences

How to test

Run the application on the physical device and check that everything push-notification-related is working accordingly.

[pagopa-github-bot]

	Warnings
:warning:	Please include a Jira ticket at the beginning of the PR title

Example of PR titles that include Jira tickets:

• single story: [PROJID-123] my PR title
• multiple stories: [PROJID-1,PROJID-2,PROJID-3] my PR title

Generated by :no_entry_sign: dangerJS against 4a52ba1978d0085ecc20476b04d283fec3170779

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 59.09091% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 49.55%. Comparing base (4f204b4) to head (4a52ba1). Report is 93 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5732      +/-   ##
==========================================
+ Coverage   48.42%   49.55%   +1.12%     
==========================================
  Files        1488     1619     +131     
  Lines       31617    32139     +522     
  Branches     7669     7771     +102     
==========================================
+ Hits        15311    15926     +615     
+ Misses      16238    16150      -88     
+ Partials       68       63       -5     

Files	Coverage Δ
...fications/components/NotificationPreviewSample.tsx	100.00% <ø> (ø)
...ons/components/NotificationsPreferencesPreview.tsx	100.00% <ø> (ø)
...res/pushNotifications/hooks/usePreviewMoreInfo.tsx	60.00% <ø> (ø)
...cations/sagas/checkNotificationsPermissionsSaga.ts	100.00% <ø> (ø)
...cations/sagas/checkNotificationsPreferencesSaga.ts	0.00% <ø> (ø)
.../features/pushNotifications/sagas/notifications.ts	85.18% <ø> (ø)
...reens/OnboardingNotificationsInfoScreenConsent.tsx	82.75% <100.00%> (ø)
...reens/OnboardingNotificationsPreferencesScreen.tsx	81.25% <100.00%> (ø)
...s/pushNotifications/store/actions/notifications.ts	100.00% <ø> (ø)
...features/pushNotifications/store/reducers/index.ts	100.00% <100.00%> (ø)
... and 12 more

... and 508 files with indirect coverage changes

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