feat: initial recursive archive cataloging impl

Signed-off-by: Keith Zantow <keith.zantow@anchore.com>

internal/index/prefix_suffix_test.go

@@ -0,0 +1,29 @@
+package index
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_PrefixSuffix(t *testing.T) {
+	i := PrefixSuffix[int]{}
+	i.Set("one", 1)
+	i.Set("once", 11)
+	i.Set("onesie", 111)
+	i.Set("two", 2)
+	i.Set("done", 99)
+	require.Equal(t, 1, i.Get("one"))
+	require.Equal(t, 11, i.Get("once"))
+	require.Equal(t, 111, i.Get("onesie"))
+	require.Equal(t, 2, i.Get("two"))
+	requireHasAll(t, i.ByPrefix("on"), 1, 11, 111)
+	requireHasAll(t, i.BySuffix("e"), 1, 11, 111, 99)
+	requireHasAll(t, i.BySuffix(""), 1, 2, 11, 111, 99)
+	requireHasAll(t, i.BySuffix("one"), 1, 99)
+	requireHasAll(t, i.BySuffix("sie"), 111)
+}
+
+func Test_reverse(t *testing.T) {
+	require.Equal(t, "case", reverse("esac"))
+}