Add EventStore Hosting and Client integrations

Closes #236

This pull request includes several updates to the Aspire CommunityToolkit including new projects for EventStore Hosting and Client integrations, a simple "bank account" example project, tests and updates to dependencies.

Project Additions and Updates:

Added new EventStore projects to the solution, including Aspire.CommunityToolkit.Hosting.EventStore, Aspire.CommunityToolkit.EventStore, and their respective test and example projects.

Dependency Updates:

Added new dependencies in Directory.Packages.props, including AspNetCore.HealthChecks.EventStore.gRPC, EventStore.Client.Extensions.OpenTelemetry, and EventStore.Client.Grpc.Streams. (Directory.Packages.props) [1]

Code Ownership:

Updated the CODEOWNERS file to include new EventStore projects and assigned ownership to @fredimachado. (CODEOWNERS)

New Example Project:

Added a simple "bank account" example project for EventStore service. (examples/eventstore/Aspire.CommunityToolkit.Hosting.EventStore.ApiService) [1]

PR Checklist

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

Other information

Docs PR: https://github.com/dotnet/docs-aspire/pull/2143

CommunityToolkit / Aspire