Feat 541 add a setting to only sync over wifi

[AlphaGergedan]

Add setting to only sync over wifi using connectivity_plus. Also refactors snackbar notifications.

Closes #541

Help needed on i18 translations, thanks!

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 30 lines in your changes missing coverage. Please review.

Project coverage is 47.72%. Comparing base (bea45b7) to head (317c484).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/components/settings/nextcloud_profile.dart	0.00%	11 Missing ⚠️
lib/components/notifs/snackbar.dart	0.00%	8 Missing ⚠️
lib/components/home/syncing_button.dart	0.00%	6 Missing ⚠️
lib/data/nextcloud/saber_syncer.dart	0.00%	4 Missing ⚠️
lib/pages/editor/editor.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1368      +/-   ##
==========================================
- Coverage   47.80%   47.72%   -0.09%     
==========================================
  Files         115      116       +1     
  Lines        9097     9125      +28     
==========================================
+ Hits         4349     4355       +6     
- Misses       4748     4770      +22     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.