Implement QEMU Virtualisation example for the new RISC-V32 GNU port

[fdesbiens]

Objective

Provide an example build configuration and verification setup using QEMU “virt” machine for RISC-V32 GNU.

Deliverables

• Add an example build tree / CMake configuration for qemu-virt with RISC-V32/GNU support.
• Document all build and run steps for QEMU virt.
• Validate correct operation of ThreadX features:
  • Timer tick
  • Interrupts
  • Context switching
  • Stable execution over time

Tags

Addition, Medium Complexity,