only show "Add with CTRL+Enter" only when there is no options to select from + cursor with single select

[GamalTawaf]

First, Thanks for the amazing library :)
I have two issues:

1. The issue is basically the same as mentioned here: An option to show "Create with CTRL+Enter" only when there is no suggestion available #86. REPL
2. the second one is when user selects one item we still see the cursor telling the user they can select another but I do not have multiple
   here is a demo of what I mean: I was allowed to add "test" even though it is part of the options

Env:

    "svelecte": "^4.4.0",
    "svelte": "^4.0.5",

[mskocik]

I have two issues:

1. this cannot be done. You can't guarantee that user wouldn't want to insert some "substring" of available options. Take your example: If you would want to insert est it wouldn't be possible.
2. is valid bug, but you should be using createFilter differently. I understand that docs are misleading (description of createFilter is still in v3 format). Your createFilter function should return true if you want to prevent item creation. Will be fixed soon.

[mskocik]

Now fixed in v4.4.1 and here is your REPL fixed (slightly updated filterCreate function)