Create diagram for IR objects (#69)

Create concepts diagram and display it on readme. Also updates the
readme to display the logo.

---------

Signed-off-by: Justin Chu <[email protected]>

Author: justinchuby

README.md

@@ -1,4 +1,4 @@
-# ONNX IR
+# <img src="docs/_static/logo-light.png" alt="ONNX IR" width="250"/>
 
 [![PyPI - Version](https://img.shields.io/pypi/v/onnx-ir.svg)](https://pypi.org/project/onnx-ir)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/onnx-ir.svg)](https://pypi.org/project/onnx-ir)
@@ -36,6 +36,10 @@ pip install git+https://github.com/onnx/ir-py.git
 - Pythonic and familiar APIs: Classes define Pythonic apis and still map to ONNX protobuf concepts in an intuitive way.
 - No protobuf dependency: The IR does not require protobuf once the model is converted to the IR representation, decoupling from the serialization format.
 
+## Concepts Diagram
+
+![Concepts Diagram](docs/resource/onnx-ir-entities.svg)
+
 ## Code Organization 🗺️
 
 - [`_protocols.py`](src/onnx_ir/_protocols.py): Interfaces defined for all entities in the IR.

REUSE.toml

@@ -11,18 +11,20 @@ path = [
     ".editorconfig",
     ".gitignore",
     "**/*.css",
+    "**/*.excalidraw",
     "**/*.ipynb",
     "**/*.md",
     "**/*.png",
     "**/*.rst",
+    "**/*.svg",
     "**/*.textproto",
     "**/*.toml",
     "**/*.yml",
     "CODEOWNERS",
     "MANIFEST.in",
-    "src/onnx_ir/py.typed",
     "requirements*.txt",
     "requirements/**/*.txt",
+    "src/onnx_ir/py.typed",
 ]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "Copyright (c) ONNX Project Contributors"