sdk/hints: add badger implementation.

sdk/hints/test/badger_test.go

@@ -0,0 +1,21 @@
+package test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/nbd-wtf/go-nostr/sdk/hints/badgerh"
+)
+
+func TestBadgerHints(t *testing.T) {
+	path := "/tmp/tmpsdkhintsbadger"
+	os.RemoveAll(path)
+
+	hdb, err := badgerh.NewBadgerHints(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer hdb.Close()
+
+	runTestWith(t, hdb)
+}