Support parsing absolute years

adapter/handlebars/helpers/shell.go

@@ -35,6 +35,6 @@ func RegisterShell(logger util.Logger) {
 			return ""
 		}
 
-		return string(output)
+		return strings.TrimSpace(string(output))
 	})
 }

cmd/finder_opts.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"strconv"
 	"time"
 
 	"github.com/mickael-menu/zk/core/note"
@@ -187,6 +188,8 @@ func relPaths(zk *zk.Zk, paths []string) ([]string, bool) {
 }
 
 func parseDate(date string) (time.Time, error) {
-	// FIXME: support years
+	if i, err := strconv.ParseInt(date, 10, 0); err == nil && i >= 1000 && i < 5000 {
+		return time.Date(int(i), time.January, 0, 0, 0, 0, 0, time.UTC), nil
+	}
 	return naturaldate.Parse(date, time.Now().UTC(), naturaldate.WithDirection(naturaldate.Past))
 }