Cucumber testing steps port

[robmoffat]

Describe your change

This pull request updates the test infrastructure and standardized test step definitions. The main updates include switching from a custom/shared testing package to using Standard Cucumber Steps (to move into FINOS), updating test scenarios to use the new step syntax, and making minor improvements to developer tooling.

Test infrastructure and step definitions:

• Replaced the internal @finos/testing package with standardized Cucumber steps from @robmoffat/standard-cucumber-steps and FDC3-specific steps from @finos/fdc3-schema/cucumber. This change is reflected in both package.json and documentation, and updates the source of generic test steps and utilities. [1] [2] [3] [4]
• Updated all .feature test files in packages/fdc3-agent-proxy/test/features/ to use the new step syntax, replacing phrases like with parameter(s) or with parameters with using argument(s) or using arguments, to match the new standardized step definitions. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Developer tooling:

• Added a new view script to packages/fdc3-agent-proxy/package.json for previewing test result HTML output with Vite.

These changes modernize the test setup, ensure better maintainability by using widely adopted Cucumber steps, and improve documentation and developer experience.

Related Issue

#1889

Contributor License Agreement

• I acknowledge that a contributor license agreement is required and that I have one in place or will seek to put one in place ASAP.

Review Checklist

• Issue: If a change was made to the FDC3 Standard, was an issue linked above?
• CHANGELOG: Is a CHANGELOG.md entry included?

[robmoffat]

Ready for review

[Roaders]

is this dependency a temporary measure or intended long term?

[robmoffat]

I want to move SCS to being a repo within the FDC3 project - but Kris asked for a PR (this one) demonstrating it worked first.

[robmoffat]

So eventually, @finos/standard-cucumber-steps

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.03%. Comparing base (cb00631) to head (8a8a70e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1890   +/-   ##
=======================================
  Coverage   95.03%   95.03%           
=======================================
  Files          73       73           
  Lines        4251     4251           
  Branches      596      674   +78     
=======================================
  Hits         4040     4040           
  Misses        211      211           

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[kriswest]

@robmoffat I know you are waiting to be able to migrate the testing repo. This PR will also need rebasing against main to thin down the diff. You also have a static code analysis issue to fix

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: robmoffat / name: Rob Moffat (9b97e55)

[robmoffat]

/easycla

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