.NET Aspire

[aaronpowell]

This PR is an overhaul of the dev experience to use .NET Aspire rather than our own custom docker-compose based setup. The impact should only be on the local dev experience and won't (at least, shouldn't) have any impact on how this is deployed to Azure.

Changes

• Removed docker-compose.yaml for devcontainer, instead use a standard base image
• Added a .NET Aspire AppHost project that:
  • Configures Postgres for local dev
  • Configures PgAdmin for inspecting the db (note - this doesn't work due to https://github.com/dotnet/aspire/issues/4889)
  • Configures the dependencies between the different resources and services
• Added a custom component to run the SWA emulator
• Refactored the management and proxy services to use service discovery
• Added telemetry
• Simplified the launch to just run the Aspire project, which starts everything else

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