feat: add ECS tRPC API

[jdebuseamazon]

Reason for this change

Adds support for ECS backed tRPC API, supporting use cases such as long running requests and consistent low latency responses.

Description of changes

Added similar generator code to the Lambda backed tRPC API but backed by ECS rather than Lambda, along with documentation

Description of how you validated changes

Ran tests

pnpm nx run @aws/nx-plugin:test
pnpm nx run-many --target build

Followed the quick start guide and added the new ECS tRPC API alongside the Lambda backed tRPC API, and confirmed that calls to the echo function successfully returned the expected responses. The server was tested in both local and deployed mode.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.66667% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.32%. Comparing base (763374d) to head (83c1328).

Files with missing lines	Patch %	Lines
...-plugin/src/utils/ecs-constructs/ecs-constructs.ts	61.11%	3 Missing and 4 partials ⚠️
packages/nx-plugin/src/connection/generator.ts	40.00%	2 Missing and 1 partial ⚠️
packages/nx-plugin/src/ecs/trpc/generator.ts	96.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #507      +/-   ##
==========================================
- Coverage   91.52%   91.32%   -0.21%     
==========================================
  Files          88       90       +2     
  Lines        3116     3170      +54     
  Branches      681      686       +5     
==========================================
+ Hits         2852     2895      +43     
- Misses        103      109       +6     
- Partials      161      166       +5     

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