feat: Generic Chat Formats, Tool Calling, and Huggingface Pull Support for Multimodal Models (Obsidian, LLaVA1.6, Moondream) (#1147)

* Test dummy image tags in chat templates

* Format and improve  types for llava_cpp.py

* Add from_pretrained support to llava chat format.

* Refactor llava chat format to use a jinja2

* Revert chat format test

* Add moondream support (wip)

* Update moondream chat format

* Update moondream chat format

* Update moondream prompt

* Add function calling support

* Cache last image embed

* Add Llava1.6 support

* Add nanollava support

* Add obisidian support

* Remove unnecessary import

* Re-order multimodal chat formats

* Logits all no longer required for multi-modal models

* Update README.md

* Update docs

* Update README

* Fix typo

* Update README

* Fix typo