Allow litteral type in default_type_replacements config

[Grafikart]

The behaviour of default_type_replacements seems unintuitive.
I have data with UploadedFile and I thought the default_type_replacements could be a good place to define a custom type.

    'default_type_replacements' => [
         // ...
        \Illuminate\Http\UploadedFile::class => 'File',
    ],

But it generates any. It does the same if I set "number" as a type.
Digging further, I understood that this config expect a PHP type, but it can complicate things if we want to cast to a specific TypeScript type.

Suggestion

To keep backward compatibility, the library could add a new object to define native types

    'default_type_replacements' => [
         // ...
        \Illuminate\Http\UploadedFile::class => new LiteralTypeScriptType('File'),
    ],