Replace EventStore info with KurrentDB info

[fredimachado]

Replace EventStore information with KurrentDB information.

KurrentDB PR (merged): #895

Aspire DOCs

KurrentDB docs PR (under review): dotnet/docs-aspire#5360

NOTE:

• https://learn.microsoft.com/dotnet/aspire/community-toolkit/hosting-kurrentdb is not yet available.

PR Checklist

• Created a feature/dev branch in your fork (vs. submitting directly from a commit on main)
• Based off latest main branch of toolkit
• PR doesn't include merge commits (always rebase on top of our main, if needed)
• New integration
  • Docs are written
  • Added description of major feature to project description for NuGet package (4000 total character limit, so don't push entire description over that)
• Tests for the changes have been added (for bug fixes / features) (if applicable)
• Contains NO breaking changes
• Every new API (including internal ones) has full XML docs
• Code follows all style conventions

Other information