[PM-11924] Add ssh-key item type

[quexten]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-11924

Server PR: https://bitwarden.atlassian.net/browse/PM-10394

📔 Objective

Add a new item type for ssh-keys.

⏰ 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 – cbe63d41-a2c4-4902-8377-9f7ec59a7ba9

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 85.54913% with 25 lines in your changes missing coverage. Please review.

Project coverage is 58.60%. Comparing base (be75311) to head (b835c2f). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/bitwarden-vault/src/cipher/ssh_key.rs	0.00%	15 Missing :warning:
crates/bitwarden-exporters/src/models.rs	14.28%	6 Missing :warning:
crates/bitwarden-vault/src/cipher/cipher.rs	94.64%	3 Missing :warning:
crates/bitwarden-exporters/src/lib.rs	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1037      +/-   ##
==========================================
+ Coverage   58.27%   58.60%   +0.32%     
==========================================
  Files         197      198       +1     
  Lines       13614    13782     +168     
==========================================
+ Hits         7934     8077     +143     
- Misses       5680     5705      +25     

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[quexten]

Seems the linting and ruby build failures are unrelated and also happening on other PRs.

[Hinton]

Merged in the latest main which should fix most of the workflows.