feat: Only keep 1 keypair (32)

[bmingles]

• Whenever new key pair is generated, it completely replaces any existing ones in secret storage (even for other users)
• An attempt is made to delete associated public keys from the server

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
6	6	0	0	0	0	0	04:59:35

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
should default to the correct settings	passed ✅	1865
should return custom settings: Empty configs	passed ✅	292
should return custom settings: Populated configs	passed ✅	142
should be able to load VSCode	passed ✅	1092
should only be visible when a supported file type is active: test.groovy	passed ✅	2662
should only be visible when a supported file type is active: test.py	passed ✅	1009

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨