🔨 Restructure entire project logic

- Moved readers to the config package
- Added an option to read remote config files
- Moved the validation package to the config package and removed the validator dependency
- Moved the customerrors package to the config package
- Replaced fatih/color with jedib0t/go-pretty/v6/text
- Removed proxy check functionality
- Added param, header, cookie, body, and proxy flags to the CLI
- Allowed multiple values for the same key in params, headers, and cookies

types/duration.go

@@ -0,0 +1,36 @@
+package types
+
+import (
+	"encoding/json"
+	"errors"
+	"time"
+)
+
+type Timeout struct {
+	time.Duration
+}
+
+func (timeout *Timeout) UnmarshalJSON(b []byte) error {
+	var v any
+	if err := json.Unmarshal(b, &v); err != nil {
+		return err
+	}
+	switch value := v.(type) {
+	case float64:
+		timeout.Duration = time.Duration(value)
+		return nil
+	case string:
+		var err error
+		timeout.Duration, err = time.ParseDuration(value)
+		if err != nil {
+			return errors.New("Timeout is invalid (e.g. 400ms, 1s, 5m, 1h)")
+		}
+		return nil
+	default:
+		return errors.New("Timeout is invalid (e.g. 400ms, 1s, 5m, 1h)")
+	}
+}
+
+func (timeout Timeout) MarshalJSON() ([]byte, error) {
+	return json.Marshal(timeout.Duration.String())
+}