feat: add method to retrieve file attachments for failed tests

[gibiw]

#719
This pull request includes several changes to the cypress-qase-reporter package, focusing on fixing issues with screenshot uploads, updating the package version, and refactoring the code to improve functionality and maintainability.

Bug Fixes:

• Fixed an issue with screenshots not being uploaded to Qase for failed tests. (qase-cypress/changelog.md, qase-cypress/src/reporter.ts) [1] [2]

Version Update:

• Updated the package version from 2.2.3 to 2.2.4 in package.json. (qase-cypress/package.json)

Code Refactoring:

• Added a new FileSearcher class to handle file searching operations, replacing the old traverseDir function. (qase-cypress/src/fileSearcher.ts, qase-cypress/src/reporter.ts) [1] [2]
• Removed the findAttachments method and replaced its functionality with the new FileSearcher class. (qase-cypress/src/reporter.ts)
• Added a getTestFileName method to extract the file name from a test suite. (qase-cypress/src/reporter.ts)

Event Handling:

• Added an event listener for EVENT_TEST_BEGIN to record the start time of each test. (qase-cypress/src/reporter.ts) [1] [2]