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/mem.go

@@ -0,0 +1,35 @@
+package monitoring
+
+import (
+	"github.com/shirou/gopsutil/mem"
+)
+
+type RamInfo struct {
+	Total uint64 `json:"total"`
+	Used  uint64 `json:"used"`
+}
+
+func Ram() RamInfo {
+	raminfo := RamInfo{}
+	v, err := mem.VirtualMemory()
+	if err != nil {
+		raminfo.Total = 0
+		raminfo.Used = 0
+	} else {
+		raminfo.Total = v.Total
+		raminfo.Used = v.Used
+	}
+	return raminfo
+}
+func Swap() RamInfo {
+	swapinfo := RamInfo{}
+	s, err := mem.SwapMemory()
+	if err != nil {
+		swapinfo.Total = 0
+		swapinfo.Used = 0
+	} else {
+		swapinfo.Total = s.Total
+		swapinfo.Used = s.Used
+	}
+	return swapinfo
+}