feat(project): support for config-bundle add

[nborges-aws]

Description

Adds agentcore project add config-bundle for registering configuration bundles in an AgentCore project.

• Supports name, description, components, branch name, commit message, and KMS key ARN
• Accepts components as inline JSON, file://<path>, or stdin.
• Validates inputs against the project schema
• Adds the bundle to agentcore/agentcore.json

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

How have you tested the change?

• bun run test (1535 pass, 0 fail)
• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the
terms of your choice.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 98.88889% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 97.14%. Comparing base (14e0440) to head (e323d14).

Files with missing lines	Patch %	Lines
src/handlers/project/add/config-bundle/index.ts	98.64%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           refactor    #2049   +/-   ##
=========================================
  Coverage     97.13%   97.14%           
=========================================
  Files           381      382    +1     
  Lines         22797    22884   +87     
=========================================
+ Hits          22145    22231   +86     
- Misses          652      653    +1     

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[notgitika]

LGTM!