Replace Jasmine with Jest

[Copilot]

Migrates test framework from Jasmine to Jest, consolidating testing and coverage tooling.

Changes:

• Replaced jasmine with jest in devDependencies
• Removed nyc (Jest has built-in coverage)
• Updated test scripts: jasmine src/*.spec.js → jest
• Updated coverage scripts: nyc npm run test && nyc report --reporter=html → jest --coverage
• Converted test matcher syntax: jasmine.any(Array) → expect.any(Array)
• Removed .nycrc configuration file

Test syntax change:

// Before
expect(result).toEqual(jasmine.any(Array));

// After
expect(result).toEqual(expect.any(Array));

All 3 test suites pass with 93.33% code coverage.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Replace Jasmine by Jest</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Replace Jasmine by Jest #22

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