Add Streaming Response

[rrr63]

How to call it :

$stream = Agent::using(OpenRouter::class)
    ->withKey('')
    ->model('')
    ->prompt('What is capital of France ?')
    ->withStreaming()
    ->send();

foreach ($stream as $chunk) {
    echo $chunk;
}

// or 

$stream = Agent::using(OpenRouter::class)
    ->withKey('')
    ->model('')
    ->prompt('What is capital of France ?')
    ->stream();

foreach ($stream as $chunk) {
    echo $chunk;
}

[techmahedy]

@rrr63 just loved it