refactor: 升级依赖版本并优化构建系统

- 升级核心依赖 (axum 0.8, tower-http 0.6, alsa 0.11 等)
- 简化交叉编译配置，切换至 Debian 11 提高兼容性
- 新增 Debian 包打包支持 (debuerreotype 模板)
- 移除独立的 mjpeg 解码器，简化视频模块
- 静态链接 libx264/libx265/libopus 到二进制

build/debian/control.tpl

@@ -0,0 +1,22 @@
+Source: one-kvm
+Section: admin
+Priority: optional
+Maintainer: SilentWind <admin@mofeng.run>
+
+Package: one-kvm
+Architecture: {arch}
+Depends: ${{auto}}, ca-certificates{distsuffix}
+Description: A open and lightweight IP-KVM solution written in Rust
+ Enables BIOS-level remote management of servers and workstations.
+ .
+ One-KVM provides video capture, HID emulation (keyboard/mouse),
+ mass storage device forwarding, and ATX power control for
+ remote server management over IP.
+ .
+ Features:
+  * Hardware-accelerated video encoding (VAAPI, QSV, RKMPP)
+  * WebRTC and MJPEG streaming with low latency
+  * USB HID emulation via OTG gadget
+  * Mass storage device for ISO/IMG mounting
+  * ATX power control via GPIO or USB relay
+Homepage: https://github.com/mofeng-git/One-KVM