[PM-28997] Migrate personal vault to My Items

[andrebispo5]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-28997

📔 Objective

This pull request introduces the initial implementation of the "Migrate to My Items" feature, which guides users through transferring ownership of vault items to their organization or leaving the organization if they decline. It includes new UI views, state management, processor logic, localized strings, and supporting assets.

These changes lay the groundwork for the "Migrate to My Items" feature, providing a interface and state-driven logic for handling organization item ownership policies.

📸 Screenshots

In the screenshots the organization name is missing, it will be added later on.

⏰ 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 – 984a76d1-2e5d-481e-9142-c5486c9ccf6a

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

[codecov]

Codecov Report

❌ Patch coverage is 72.17391% with 64 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.30%. Comparing base (a39361e) to head (8584963).

Files with missing lines	Patch %	Lines
...t/MigrateToMyItems/MigrateToMyItemsProcessor.swift	0.00%	51 Missing ⚠️
...Platform/Application/Extensions/View+Toolbar.swift	50.00%	10 Missing ⚠️
.../Vault/MigrateToMyItems/MigrateToMyItemsView.swift	97.82%	2 Missing ⚠️
...Vault/MigrateToMyItems/MigrateToMyItemsState.swift	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2196      +/-   ##
==========================================
- Coverage   85.53%   84.30%   -1.24%     
==========================================
  Files        1737     1983     +246     
  Lines      147232   162592   +15360     
==========================================
+ Hits       125942   137067   +11125     
- Misses      21290    25525    +4235     

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