[DOC] Write documentation around setting the input_lenght, batch size and decode length parameters

[OlivierDehaene]

See: #165

[Aryan-Deshpande]

Hey, I am new to this repository, and fascinated by the way the inference is done. I would like to start with this issue, but I first need to get familiar with the repository/pipeline. How can I get started?.

[ParagEkbote]

Would you like to have a conceptual guide on the mentioned topic?

Could you please clarify? I'd love to open a PR to resolve this issue.

cc: @OlivierDehaene

[ParagEkbote]

Could you please clarify? I'd love to open a PR to resolve this issue.

cc: @OlivierDehaene