Feat: GGUF reads

[DatCaptainHorse]

I had already written this GGUF reader few weekends back, I just added few new GGML types introduced.

Marking as draft since it's not properly part of the codebase, as I'm not sure how things should be structured here.

Feel free to comment and ask for changes, hoping this will help push this project forward.

Snippet of the debug method printing out info for Mistral-Small-Instruct Q2_K_L gguf file:

GGUF File Information:
Magic Number: 46554747 (GGUF)
Version: 3
Tensor Count: 507
Metadata KV Count: 42
Metadata:
        Metadata KV 0:
                Key: general.architecture, Type: STRING, Value: llama
        Metadata KV 1:
                Key: general.type, Type: STRING, Value: model
        Metadata KV 2:
                Key: general.name, Type: STRING, Value: Mistral Small Instruct 2409
        Metadata KV 3:
                Key: general.version, Type: STRING, Value: 2409
        Metadata KV 4:
                Key: general.finetune, Type: STRING, Value: Instruct
        Metadata KV 5:
                Key: general.basename, Type: STRING, Value: Mistral
        Metadata KV 6:
                Key: general.size_label, Type: STRING, Value: Small
        Metadata KV 7:
                Key: general.license, Type: STRING, Value: other
        Metadata KV 8:
                Key: general.license.name, Type: STRING, Value: mrl
...