Show error alert when attempting to import a password-protected 2fas export

[KatherineInCode]

📔 Objective

This updates the 2FAS import flow to detect if the user is trying to import a password-protected export, and provide an error alert if they do indicating we do not currently support that.

📸 Screenshots

⏰ 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[bot]]

Checkmarx One – Scan Summary & Details – 62a42459-1b9f-4bf5-aa77-7b96ca56a111

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 61.78%. Comparing base (1b5a279) to head (f273fb6).

Files	Patch %	Lines
...gs/Settings/ImportItems/ImportItemsProcessor.swift	0.00%	2 Missing :warning:
...ared/Core/Vault/Models/Enum/ImportFormatType.swift	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #115 +/- ## ========================================== - Coverage 62.36% 61.78% -0.58% ========================================== Files 199 199 Lines 6754 6754 ========================================== - Hits 4212 4173 -39 - Misses 2542 2581 +39 ```

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