fix: improve build tool detection

[behnazh-w]

Summary

Refactored the build tool detection logic by reusing the repo verifier’s path filtering approach. This change ensures that paths that are likely used for testing are excluded during the build tool detection process. Additionally, this PR adds an integration test for a project that uses Maven, with Gradle used as an example to demonstrate the filtering mechanism.

Description of changes

• Refactored build tool detection reusing the repo verifier’s logic for filtering paths that are likely used for testing, improving the reliability of build tool detection by excluding unnecessary paths.
• Integration test: added an integration test for a project that uses Maven as the build tool. The test also demonstrates how Gradle is treated as an example and excluded from detection if it falls under test-related or example directories.

Related issues

This PR supersedes #324