Add compactor and marshal func

parser.go

@@ -1,6 +1,7 @@
 package goap
 
 import (
+	"encoding/json"
 	"fmt"
 	"slices"
 
@@ -155,3 +156,21 @@ func FindAttribute[T BaseApChain](object BaseApChain) (T, bool) {
 	}
 	return obj, true
 }
+
+func Compact(chain BaseApChain, ldContext map[string]any) (map[string]any, error) {
+	chainMap := chain.MarshalToMap()
+	proc := ld.NewJsonLdProcessor()
+	options := ld.NewJsonLdOptions("")
+	return proc.Compact(chainMap, ldContext, options)
+}
+
+func Marshal(chain BaseApChain, ldContext map[string]any) ([]byte, error) {
+	chainMap := chain.MarshalToMap()
+	proc := ld.NewJsonLdProcessor()
+	options := ld.NewJsonLdOptions("")
+	compacted, err := proc.Compact(chainMap, ldContext, options)
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal(compacted)
+}