feat: introduce YAML configuration

pkg/config/config.go

@@ -0,0 +1,38 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Rcond RcondConfig `yaml:"rcond"`
+}
+
+type RcondConfig struct {
+	Addr     string `yaml:"addr"`
+	ApiToken string `yaml:"api_token"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	yamlFile, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var config Config
+	err = yaml.Unmarshal(yamlFile, &config)
+	if err != nil {
+		return nil, err
+	}
+	return &config, nil
+}
+
+func SaveConfig(path string, config *Config) error {
+	yamlFile, err := yaml.Marshal(config)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, yamlFile, 0644)
+}