Include inode in JSON output for find and ls

This introduces the inode attribute to the JSON output emitted for nodes
in `ls` and matches in `find`. There doesn't seem to be any discernible
reason to omit the inode and it can be useful in scripting scenarios.

cmd/restic/cmd_find.go

@@ -126,7 +126,6 @@ func (s *statefulOutput) PrintPatternJSON(path string, node *restic.Node) {
 
 		// Make the following attributes disappear
 		Name               byte `json:"name,omitempty"`
-		Inode              byte `json:"inode,omitempty"`
 		ExtendedAttributes byte `json:"extended_attributes,omitempty"`
 		Device             byte `json:"device,omitempty"`
 		Content            byte `json:"content,omitempty"`