Possibility to ignore code errors in specific folders without ignoring them

### Description

The PHP code with composer contain third-party code in `/vendor` folder. The node.js code contain third-party code in `/node_modules` folder. Sometimes they contain errors and because of them, the Netbeans show an error mark on the project:

It is possible to add this files/folders into „ignored folders“, but it unfortunately also remove them from code analysis for code suggestion.

### Use case/motivation

I want to be informed, that „my“ code contain some errors, but I'm not interested in errors in third-party codes.
But I want to work with this code and want the code suggestion at the same time.

I also hope, that code-analysis without looking for errors can be a little bit faster :)

### Related issues

[https://github.com/apache/netbeans/issues/5416](https://github.com/apache/netbeans/issues/5416)

### Are you willing to submit a pull request?

I want to, but I'm not a Java developer

### Code of Conduct

Yes

Start by tracing how NetBeans handles ignored folders and how code analysis differs from code completion for PHP and Node.js projects. Review related issue #5416 for existing context. Done means third-party errors can be suppressed while the ignored code remains available for code suggestions.

Written by the indexing model from the issue text.