Add Banana Pi BPI-F3 Board to the ThreadX CI pipeline

[fdesbiens]

Objective

Integrate Banana Pi BPI-F3 (RV32/64 capable board) into the ThreadX continuous integration pipeline.

Deliverables

• Add BPI-F3 as a recognized test target in CI configuration (GitHub Actions).
• Ensure builds run cleanly on board or via automated hardware testing infrastructure.

Tags

Addition, Medium Complexity,