feat: Add Intel e1000e PCIe NIC, VirtIO-GPU 2D accelerator, CPUFreq governor, and VirtIO-Input drivers

- Implement Intel 82574L / 82567LM / I217 / I219 PCIe Gigabit NIC driver with DMA ring buffers and auto-negotiation in drivers/net/e1000e.c and include/drivers/e1000e.h
- Implement VirtIO-GPU 2D hardware graphics display adapter driver with dirty rect flushing in drivers/virtio/virtio_gpu.c and include/drivers/virtio_gpu.h
- Implement Dynamic CPU Frequency Scaling and ACPI CPPC Power Governor with performance, powersave, ondemand, conservative, and schedutil policies in drivers/power/cpufreq.c and include/drivers/cpufreq.h
- Implement VirtIO-Input para-virtualized tablet/mouse event driver in drivers/virtio/virtio_input.c and include/drivers/virtio_input.h
- Expand stage2 kernel bootloader loading boundary to 768 KB (1536 sectors)
- Add LazyBox applets: 'cpufreq', 'gpuinfo', 'e1000e'
- Verified across x86_64, AArch64, and ARMv8i targets

boot/stage2.asm

@@ -93,7 +93,7 @@ start2:
     mov word [kernel_dap_seg], 0x1000
     mov dword [kernel_dap_lba], 16
     mov dword [kernel_dap_lba + 4], 0
-    mov cx, 14                         ; 14 chunks * 64 sectors = 896 sectors (448 KB)
+    mov cx, 24                         ; 24 chunks * 64 sectors = 1536 sectors (768 KB)
 
 .kernel_chunk_loop:
     push cx
@@ -199,7 +199,7 @@ pm_entry:
     ; Copy kernel from 0x10000 to 0x100000 (1MB mark) - 192 KB (384 sectors)
     mov esi, 0x10000
     mov edi, 0x100000
-    mov ecx, (896 * 512) / 4
+    mov ecx, (1536 * 512) / 4
     rep movsd
 
     ; Enable PAE in CR4