Pref/toggle to disable note creation on link

### 🚀 The feature, motivation and pitch

I seem to use Obsidian differently than most:

1. create a worldbuilding vault
2. write a manuscript, linking to already-existing files

This means when I type `[[..`, I want to link to an existing file every time. This means that slow autocomplete or typos start to contaminate my vault with unwanted new files.

Request: a pref and possibly a toggle to disable note creation in the cmp.

I've hacked this into my local install by adding a
```lua
if true then
return
end
```

in `cmp_obsidian_new.lua`, but I haven't yet figured the best way to support this elegantly.

### Alternatives

_No response_

### Additional context

_No response_