Add support for multiple policies (#16)

Change policy annotation to support comma-separated list of policies.

---------

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>

internal/util/slices.go

@@ -1,5 +1,7 @@
 package util
 
+import "strings"
+
 // Contains return if y is in slice x
 func Contains[T comparable](x []T, y T) bool {
 	for _, v := range x {
@@ -39,3 +41,16 @@ func Equivalent[T comparable](x, y []T) bool {
 
 	return true
 }
+
+// SplitTrim split string and trim whitespace
+func SplitTrim(str, sep string) []string {
+	if len(str) == 0 {
+		return nil
+	}
+	sp := strings.Split(str, sep)
+	ret := make([]string, 0, len(sp))
+	for _, v := range sp {
+		ret = append(ret, strings.TrimSpace(v))
+	}
+	return ret
+}