add peft to recipe qwen3vl

[yashaswikarnati]

What does this PR do ?

Add PEFT to qwen 3VL recipe

Changelog

• Add specific line by line info of high level changes in this PR.

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Summary by CodeRabbit

Release Notes

• Documentation

  • Added PEFT (Parameter-Efficient Fine-Tuning) section to Qwen3-VL documentation with LoRA and DoRA examples for multiple model sizes.

• New Features

  • Enabled dynamic PEFT configuration support for Qwen3-VL finetuning via CLI overrides.
  • Extended configuration API with new Qwen3-VL model variants (8B, 30B, 235B).
  • Added customizable learning rate configuration for finetuning workflows.

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