Batch Rename lets you rename to invalid name without error or warnings

[ajreckof]

Godot version

4.1.dev (1becfea)

System information

MacOS 13.3 M1 Pro

Issue description

When you use batch rename you can ask him to rename to invalid node names. it won't raise any warning nor error it will just rename to a valid node names without informing you of the change. For comparison with simple renames this is shown as warning

Steps to reproduce

1. create a root Node and two Node children
2. select the two children
3. Batch rename the e to %
4. See that childrens have been renamed to Nod_ and Nod_2 without warning

Minimal reproduction project

N/A

[KoBeWi]

We have a pretty standard way to validate and inform about errors. Create New Scene dialog for example:

Something like this could be implemented for the batch rename dialog.