refactor(global): move config to global package and consolidate handlers

- Move Config struct and related functions to global package
- Consolidate handler utilities into utils package
- Remove deprecated handlers and instance packages
- Add new handlers package with settings and proxy functionality
- Update config.json to include watchdog enabled flag

global/global.go

@@ -13,6 +13,14 @@ type SoftwareInfo struct {
 	BuildType   string
 }
 
+var Software = SoftwareInfo{
+	Name:      "Super-frpc",
+	Version:   "0.0.1",
+	Developer: "Madobi Nanami",
+	BuildVer:  1,
+	BuildType: "debug",
+}
+
 type StatusFlags struct {
 	Debug             bool
 	Online            bool
@@ -25,16 +33,35 @@ var (
 	LogsDB   *sql.DB
 )
 
-var Software = SoftwareInfo{
-	Name:      "Super-frpc",
-	Version:   "0.0.1",
-	Developer: "Madobi Nanami",
-	BuildVer:  1,
-	BuildType: "debug",
-}
-
 var Is = StatusFlags{
 	Debug:             false,
 	Online:            false,
 	WatchdogConnected: false,
 }
+
+type Config struct {
+	ListenAddr   string `json:"listenAddr"`
+	ListenPort   string `json:"listenPort"`
+	FrpcPath     string `json:"frpcPath"`
+	InstancePath string `json:"instancePath"`
+	Debug        bool   `json:"debug"`
+	Watchdog     struct {
+		Enabled bool `json:"enabled"`
+		Port int `json:"port"`
+	} `json:"watchdog"`
+}
+
+var CurrentConfig = Config{
+	ListenAddr: "0.0.0.0",
+	ListenPort: "7000",
+	FrpcPath:   "/usr/bin/frpc",
+	InstancePath: "/var/lib/frpc",
+	Debug:        false,
+	Watchdog:     struct {
+		Enabled bool `json:"enabled"`
+		Port int `json:"port"`
+	}{
+		Enabled: false,
+		Port: 0,
+	},
+}