Draft: Add BSP for BeagleV-Fire Board

This merge request introduces the Board Support Package (BSP) for the BeagleV-Fire board, initially developed by Dario. The BSP has been renamed from bvf to beaglevfire for clarity and consistency.

1. BSP Development: The BSP for the BeagleV-Fire board has been created by Dario. It includes all necessary configurations, startup code, clock and irq specific to the BeagleV-Fire board.
2. BSP Renaming: The BSP name has been changed from bvf to beaglevfire to better reflect the board's identity and to align with naming conventions.
3. Hardware Testing: The BSP has been tested on actual BeagleV-Fire hardware using the Hart Software Services (HSS) method.
4. RTEMS Testing: Although the rtems-test framework is not fully prepared to run the entire testsuite using this BSP, I have successfully tested several codes from samples, sptests, and smptests. All tests executed correctly, confirming that the BSP functions as expected on the BeagleV-Fire board.