feat: init pc-monitor project

- Client: Go-based Windows hardware monitoring (CPU, GPU, memory, disk, network, power)
- Server: Go + Gin + SQLite backend with REST API
- Frontend: Vue 3 + Element Plus dashboard
- Docker deployment support
- Windows service installation script

client/config.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"os"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Server  ServerConfig  `yaml:"server"`
+	Collect CollectConfig `yaml:"collect"`
+	Report  ReportConfig  `yaml:"report"`
+}
+
+type ServerConfig struct {
+	URL   string `yaml:"url"`
+	Token string `yaml:"token"`
+}
+
+type CollectConfig struct {
+	Interval time.Duration `yaml:"interval"`
+}
+
+type ReportConfig struct {
+	Interval time.Duration `yaml:"interval"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	cfg := &Config{
+		Server: ServerConfig{
+			URL: "http://localhost:8080",
+		},
+		Collect: CollectConfig{
+			Interval: 30 * time.Second,
+		},
+		Report: ReportConfig{
+			Interval: 60 * time.Second,
+		},
+	}
+
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			data, _ = yaml.Marshal(cfg)
+			os.WriteFile(path, data, 0644)
+			return cfg, nil
+		}
+		return nil, err
+	}
+
+	if err := yaml.Unmarshal(data, cfg); err != nil {
+		return nil, err
+	}
+
+	return cfg, nil
+}
+
+func SaveConfig(path string, cfg *Config) error {
+	data, err := yaml.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0644)
+}