bugfix/init files when currentdirectory is set

[shedyfreak]

I reuse go-gorm PR guidelines, intellectual property goes to the team maintaining the project

[x] Do only one thing
[x] Non breaking API changes
[x] Tested

Scenario

                   item := huh.NewFilePicker().
				Title("Select a file:").
				Description("This will be your profile image.").
				AllowedTypes([]string{".pdf", ".docx", ".xlsx", ".gif"}).
				Value(&myModel.Value)
item.CurrentDirectory("random/path/")

Here as you might have seen I m creating a FilePicker, and I am trying to read a directory

What's acutally happening
CurrentDirectory and files within the FilePicker are already set to working directory (".")
in huh/field_filepicker.go line 50-52
using Init() when setting CurrentDirectory is set will give the desired behaviour

alternatively here is a PR to improve the comment over CurrentDirectory function
#229

even though it's not straight forward how to do that

here is how I did it, please let me know if there is an easier way or I got something wrong

                if cmd := item.Init(); cmd != nil {
				model, _ := item.Update(cmd())
				item = model.(*huh.FilePicker)
			}

[maaslalani]

I like this one over #229!

[shedyfreak]

Thank you for your review, for the failing test it seems something went wrong with context and it's not relevant for the PR

[maaslalani]

Please rebase on main if possible! Thank you

[shedyfreak]

PR updated with main

[maaslalani]

Thanks so much @shedyfreak!