Testing docs

[aaronpowell]

Summary

Started to expand the docs on testing to cover some more advanced aspects of testing. Focused on approaches to manage the app host within test runs and accessing the resources that are available in the app host during a test.

Fixes #1516

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Internal previews

📄 File	🔗 Preview link
.github/dependabot.yml	Generated by dependabot-bot.
docs/fundamentals/setup-tooling.md	.NET Aspire setup and tooling
docs/testing/accessing-resources.md	Access resources in .NET Aspire tests
docs/testing/manage-app-host.md	Manage the app host in .NET Aspire tests
docs/testing/write-your-first-test.md	docs/testing/write-your-first-test
docs/toc.yml	docs/toc
docs/whats-new/dotnet-docs-aspire-mod0.md	.NET Aspire docs: What's new for September 2024

[IEvangelist]

This looks great, thank you so much! I provided a lot of suggestions, but that's to ensure that this content aligns with the expected quality, consistency, and styling of the docs. I didn't approve this yet, as I want to have another look once suggestions are applied. Also, we need to determine if this is going into the .NET Aspire 9 GA release branch or main.

[aaronpowell]

This looks great, thank you so much! I provided a lot of suggestions, but that's to ensure that this content aligns with the expected quality, consistency, and styling of the docs. I didn't approve this yet, as I want to have another look once suggestions are applied.

Appreciate all the feedback, making sure that everything is the same stylistically and structurally is important.

Also, we need to determine if this is going into the .NET Aspire 9 GA release branch or main.

The content is valid in 8.x and from what I've seen there isn't anything major changing in the testing structure for 9.0 so it'll come down to your choice on what you prefer the ship timeline to be.

[aaronpowell]

All the suggestions should have been applied now (some caused problems in VS Code when applying)

[IEvangelist]

Looks good to me, we'll - thank you 🙏