Add rate limit samples to TOC and finish TODO

[Rick-Anderson]

Description

See #34925 (comment)
and #34925
TODO: Add a contents section to this topic as its still really long?

Page URL

https://review.learn.microsoft.com/en-us/aspnet/core/performance/rate-limit-samples?view=aspnetcore-9.0&branch=pr-en-us-34925

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/performance/rate-limit-samples.md

Document ID

d96ee509-2576-279e-29b3-89fbe44b0a28

Platform Id

05af3602-fe02-0ab6-50c5-1058509c4fd9

Article author

@Rick-Anderson

Metadata

• ID: d96ee509-2576-279e-29b3-89fbe44b0a28
• PlatformId: 05af3602-fe02-0ab6-50c5-1058509c4fd9
• Service: aspnet-core
• Sub-service: performance

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Associated WorkItem - 407989

[samsp-msft]

#34925 is merged.