feat: 重构配置层，添加 json 支持

internal/config/default.go

@@ -0,0 +1,39 @@
+package config
+
+import (
+	"github.com/Mmx233/BitSrunLoginGo/pkg/srun"
+)
+
+var defaultConfig = ConfFromFile{
+	Form: srun.LoginForm{
+		Domain:   "www.msftconnecttest.com",
+		UserType: "cmcc",
+	},
+	Meta: srun.LoginMeta{
+		N:    "200",
+		Type: "1",
+		Acid: "5",
+		Enc:  "srun_bx1",
+	},
+	Settings: SettingsConf{
+		Basic: BasicConf{
+			Timeout: 5,
+		},
+		Guardian: GuardianConf{
+			Duration: 300,
+		},
+		Log: LogConf{
+			FilePath: "./",
+		},
+		DDNS: DdnsConf{
+			Enable:   false,
+			TTL:      600,
+			Domain:   "www.example.com",
+			Provider: "cloudflare",
+			Config: map[string]interface{}{
+				"zone":  "",
+				"token": "",
+			},
+		},
+	},
+}