v0.13.1 folder restructure, test script added, format adapter async fix

internal/format/format.go

@@ -0,0 +1,28 @@
+package format
+
+import (
+	"logwisp/internal/config"
+	"logwisp/internal/core"
+)
+
+// Formatter defines the interface for transforming a LogEntry into a byte slice
+type Formatter interface {
+	// Format takes a LogEntry and returns the formatted log as a byte slice
+	Format(entry core.LogEntry) ([]byte, error)
+
+	// Name returns the formatter's type name (e.g., "json", "raw")
+	Name() string
+}
+
+// NewFormatter creates a Formatter using formatter/sanitizer packages
+func NewFormatter(cfg *config.FormatConfig) (Formatter, error) {
+	if cfg == nil {
+		cfg = &config.FormatConfig{
+			Type:            DefaultFormatType,
+			Flags:           0,
+			SanitizerPolicy: "raw",
+		}
+	}
+
+	return NewFormatterAdapter(cfg)
+}