docs/specs: add RISC-V CPU Debug support info Add documentation regarding how QEMU handles Debug versions 0.13 and 1.0. Signed-off-by: Daniel Henrique Barboza <daniel.barboza@oss.qualcomm.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20260805182506.2943757-6-daniel.barboza@oss.qualcomm.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>