fix: remove obsolete quote reaction permission

[vycdev2]

Summary

• remove the obsolete Add Reactions bot-permission precondition from addquote and removequote now that approvals use interaction buttons
• add regression coverage for both command registrations and regenerate COMMANDS.md

Verification

• dotnet build — passed with 0 errors (2 existing SQLite package vulnerability warnings)
• dotnet test --no-build --logger "console;verbosity=minimal" — passed: 430 passed, 1 skipped, 0 failed
• dotnet test Morpheus.Tests/Morpheus.Tests.csproj --no-restore --filter FullyQualifiedName~QuoteCommandRegistrationTests --logger "console;verbosity=minimal" — passed: 2/2
• python3 -m unittest tools.test_generate_commands_md — passed: 3/3
• git diff --check — passed

Risk

• Low: this only removes a permission gate that is no longer used by the button-based approval flow; posting failures remain handled by the existing cleanup/error path.

This was generated by an AI agent (vycdev2). Please verify any changes before merging or applying.