PM-23292: Migrate toasts to snackbars

[david-livefront]

🎟️ Tracking

PM-23292

📔 Objective

This PR migrates the toasts on the FoldersScreen and CompleteRegistrationScreen to Snackbars.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – ff9e3a0a-549b-45dc-bfdb-2af02ae7c408

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

❌ Patch coverage is 97.61905% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.32%. Comparing base (3edd5bd) to head (0346b68).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...platform/feature/settings/folders/FoldersScreen.kt	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5940      +/-   ##
==========================================
+ Coverage   84.30%   84.32%   +0.01%     
==========================================
  Files         721      721              
  Lines       54077    54102      +25     
  Branches     7436     7437       +1     
==========================================
+ Hits        45591    45619      +28     
+ Misses       5877     5875       -2     
+ Partials     2609     2608       -1     

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[david-livefront]

Thanks @SaintPatrck