`workspace.library` does not honor `workspace.ignoreDir`

Nobody has claimed this yet.

### How are you using the lua-language-server?

NeoVim

### Which OS are you using?

MacOS

### What is the issue affecting?

Other

### Expected Behaviour

I think it would make sense to also honor the `workspace.ignoreDir` setting when including libraries via `workspace.library`.

My use case is probably rather niche but it pretty much breaks the indexing:
I have a local library that I want to include via `workspace.library`, at the root of the library is a directory `.direnv` which includes symlinks to nix derivations (which intern include more than 100000 lua files)

So I would expect a configuration like
```json
"workspace": {
"ignoreDir": [".direnv"],
"library": "path-to-lib"
}
```
to not index files inside `/.direnv`

### Actual Behaviour

Every file inside the library path is indexed

### Reproduction steps

Follow example from above

### Additional Notes

_No response_

### Log File

_No response_

Start by reproducing the issue with the reported workspace.library path and workspace.ignoreDir setting in NeoVim on macOS. Trace how library paths are indexed and verify that files under /.direnv are excluded while other library files remain indexed; completion is demonstrated by the reproduction no longer indexing those files.

Written by the indexing model from the issue text.