PM-10945: Add Key Connector API requests

[matt-livefront]

🎟️ Tracking

PM-10945

📔 Objective

Adds the following API requests needed to implement key connector:

• GET {key-connector-url}/user-keys
• POST {key-connector-url}/user-keys
• POST /accounts/convert-to-key-connector
• POST /accounts/set-key-connector-key
• POST /organizations/{id}/leave

⏰ 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 – de842d54-9510-48ba-8140-df49e560e5af

No New Or Fixed Issues Found

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.91667% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.50%. Comparing base (e688086) to head (5e1b843). Report is 5 commits behind head on main.

Files	Patch %	Lines
...ganization/Requests/LeaveOrganizationRequest.swift	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #832 +/- ## ========================================== + Coverage 88.48% 88.50% +0.01% ========================================== Files 601 608 +7 Lines 30280 30325 +45 ========================================== + Hits 26794 26838 +44 - Misses 3486 3487 +1 ```

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