Adding Q-LoRA support for Florence-2

[0xD4rky]

Description

Implements QLoRA (4-bit quantization) support for Florence-2 model fine-tuning.

List any dependencies that are required for this change.

Related Issue

Fixes #108

Type of change

Please delete options that are not relevant.

• [✅] New feature (non-breaking change which adds functionality)

How has this change been tested, please provide a testcase or example of how you tested the change?

Will be uploading the testing scripts in the next commits

Docs

• Will update in the next commits

[CLAassistant]

All committers have signed the CLA.

[0xD4rky]

hey @SkalskiP!

do review this PR and let me know incase of any additional things I need to take care of. I will be adding some tests and updating docs too once you approve!