[FEATURE] Centralize Functional/Integration Test Scripts into a Unified Dir

[dwisiswant0]

Describe your feature request

Centralize all functional and integration test scripts into a single, organized location. Currently scattered across the cmd/* and integration_tests/* directories, this setup complicates locating and maintaining the scripts. A unified dir structure will improve organization and discoverability.

Describe the use case of the feature

• Quickly locate, run, and update tests w/o navigating thru multiple directories.
• Reduce cognitive load, especially when understanding & contributing to the testing structure.
• Provide a standardized way to manage and add tests.
• fo CI/CD pipeline; simplify config by pointing to a single, unified test location.

Those approach will also help reduce redundancy caused by scattered tests

Describe alternatives you've considered

1. Retaining the current scattered state (nuh, uh).
2. Using symlinks.

Additional context

No response