Refactor monitoring package: remove platform-specific files and consolidate OS detection and process counting logic

- Deleted os_windows.go and process_windows.go, replacing them with platform-agnostic implementations in unit directory.
- Removed Linux-specific process counting logic from process_linux.go and integrated it into unit.
- Consolidated uptime and OS name retrieval into unit files for better organization.
- Updated update mechanism to use global variables for current version and repository.
- Introduced command-line flags for configuration, including disabling auto-update and web SSH.
- Implemented WebSocket connection handling and terminal interaction for both Unix and Windows systems.
- Added basic info upload functionality to server package, enhancing monitoring capabilities.

monitoring/unit/disk.go

@@ -0,0 +1,35 @@
+package monitoring
+
+import (
+	"github.com/shirou/gopsutil/disk"
+)
+
+type DiskInfo struct {
+	Total uint64 `json:"total"`
+	Used  uint64 `json:"used"`
+}
+
+func Disk() DiskInfo {
+	diskinfo := DiskInfo{}
+	usage, err := disk.Partitions(true)
+	if err != nil {
+		diskinfo.Total = 0
+		diskinfo.Used = 0
+	} else {
+		for _, part := range usage {
+			if part.Mountpoint != "/tmp" && part.Mountpoint != "/var/tmp" && part.Mountpoint != "/dev/shm" {
+				// Skip /tmp, /var/tmp, and /dev/shm
+				// 获取磁盘使用情况
+				u, err := disk.Usage(part.Mountpoint)
+				if err != nil {
+					diskinfo.Total = 0
+					diskinfo.Used = 0
+				} else {
+					diskinfo.Total += u.Total
+					diskinfo.Used += u.Used
+				}
+			}
+		}
+	}
+	return diskinfo
+}