[Doc][4/N] Reorganize API Reference (#11843)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

docs/source/design/arch_overview.md

@@ -53,7 +53,7 @@ for output in outputs:
 ```
 
 More API details can be found in the {doc}`Offline Inference
-</dev/offline_inference/offline_index>` section of the API docs.
+</api/offline_inference/index>` section of the API docs.
 
 The code for the `LLM` class can be found in <gh-file:vllm/entrypoints/llm.py>.
 

docs/source/design/multimodal/adding_multimodal_plugin.md

@@ -1,16 +0,0 @@
-(adding-multimodal-plugin)=
-
-# Adding a Multimodal Plugin
-
-This document teaches you how to add a new modality to vLLM.
-
-Each modality in vLLM is represented by a {class}`~vllm.multimodal.MultiModalPlugin` and registered to {data}`~vllm.multimodal.MULTIMODAL_REGISTRY`.
-For vLLM to recognize a new modality type, you have to create a new plugin and then pass it to {meth}`~vllm.multimodal.MultiModalRegistry.register_plugin`.
-
-The remainder of this document details how to define custom {class}`~vllm.multimodal.MultiModalPlugin` s.
-
-```{note}
-This article is a work in progress.
-```
-
-% TODO: Add more instructions on how to add new plugins once embeddings is in.

docs/source/design/multimodal/multimodal_index.md

@@ -1,83 +0,0 @@
-(multi-modality)=
-
-# Multi-Modality
-
-```{eval-rst}
-.. currentmodule:: vllm.multimodal
-```
-
-vLLM provides experimental support for multi-modal models through the {mod}`vllm.multimodal` package.
-
-Multi-modal inputs can be passed alongside text and token prompts to [supported models](#supported-mm-models)
-via the `multi_modal_data` field in {class}`vllm.inputs.PromptType`.
-
-Currently, vLLM only has built-in support for image data. You can extend vLLM to process additional modalities
-by following [this guide](#adding-multimodal-plugin).
-
-Looking to add your own multi-modal model? Please follow the instructions listed [here](#enabling-multimodal-inputs).
-
-## Guides
-
-```{toctree}
-:maxdepth: 1
-
-adding_multimodal_plugin
-```
-
-## Module Contents
-
-```{eval-rst}
-.. automodule:: vllm.multimodal
-```
-
-### Registry
-
-```{eval-rst}
-.. autodata:: vllm.multimodal.MULTIMODAL_REGISTRY
-```
-
-```{eval-rst}
-.. autoclass:: vllm.multimodal.MultiModalRegistry
-    :members:
-    :show-inheritance:
-```
-
-### Base Classes
-
-```{eval-rst}
-.. automodule:: vllm.multimodal.base
-    :members:
-    :show-inheritance:
-```
-
-### Input Classes
-
-```{eval-rst}
-.. automodule:: vllm.multimodal.inputs
-    :members:
-    :show-inheritance:
-```
-
-### Audio Classes
-
-```{eval-rst}
-.. automodule:: vllm.multimodal.audio
-    :members:
-    :show-inheritance:
-```
-
-### Image Classes
-
-```{eval-rst}
-.. automodule:: vllm.multimodal.image
-    :members:
-    :show-inheritance:
-```
-
-### Video Classes
-
-```{eval-rst}
-.. automodule:: vllm.multimodal.video
-    :members:
-    :show-inheritance:
-```