fix(amazonq): Fix devfile detection on Feature Dev invocation.

[ctidd]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Description

Problem: An incorrect path lookup led to devfile existence check (checkForDevFile) not detecting presence of devfile on /dev invocation. As a result, a prompt to opt-in to devfile-based build functionality would not be displayed.

Solution: Fix the check, ensuring that the devfile is now located, and the configuration prompt now triggers for a user to enable devfile-based build for /dev invocations.

Checklist

• My code follows the code style of this project
• [N/A] I have added tests to cover my changes
• A short description of the change has been added to the CHANGELOG if the change is customer-facing in the IDE.
• [M/A] I have added metrics for my changes (if required)

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.