secret: allow inserting secret from file and add trim flag

cli/internal/cli.go

@@ -38,6 +38,20 @@ var PassRemoveFlag = &cli.BoolFlag{
 	Destination: &PassRemove,
 }
 
+var File bool
+var FileFlag = &cli.BoolFlag{
+	Name:        "file, f",
+	Usage:       "Treat input as a file",
+	Destination: &File,
+}
+
+var Trim bool
+var TrimFlag = &cli.BoolFlag{
+	Name:        "trim, t",
+	Usage:       "Trim input",
+	Destination: &Trim,
+}
+
 // Force force functionality without asking.
 var Force bool