feat: add a progress bar to the onboarding flow

[cherish2003]

What

• This PR adds progress bar to the onboarding flow

Screenshot

WhatsApp.Video.2025-03-19.at.3.14.04.AM.mp4

Fixes bug(s)

• Fixes: Add a quick progress bar in the onboarding #6139

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 5.88%. Comparing base (4d9c7fc) to head (1c71cc8).
Report is 808 commits behind head on develop.

Files with missing lines	Patch %	Lines
...s/smooth_app/lib/pages/onboarding/next_button.dart	0.00%	6 Missing ⚠️
...pp/lib/pages/onboarding/onboarding_bottom_bar.dart	0.00%	4 Missing ⚠️
...oth_app/lib/pages/onboarding/permissions_page.dart	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #6461      +/-   ##
==========================================
- Coverage     9.54%   5.88%   -3.67%     
==========================================
  Files          325     496     +171     
  Lines        16411   29570   +13159     
==========================================
+ Hits          1567    1740     +173     
- Misses       14844   27830   +12986     

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