[Examples] Bootstrap functions vs. explicit code

[chr-hertel]

I'm struggling a bit with some refactoring we've done in the examples - explicitly around dealing with the result of the Platform.

I'd argue the purpose of examples is to provide working code snippets for various platforms & features. ready for copy & paste - and understanding what's going on.

in the beginning I introduced bootstrap for getting rid of secondary things - basically boring stuff that wasn't around Symfony AI. retrieving env vars with error message, a logger and instantiating an http client with a logger.

with functions like print_token_usage we now hide how to actually access and use the token data, and devs would need to switch from the example to the bootstrap.php
other functions in question: print_vectors, perplexity_print_* and print_stream

i get that there's a lot of duplicated code, but i think that's the nature of it. and I'd argue it's kinda stupid code, that is easy to maintain.

WDYT?