concept map (#917)

Summary:
Pull Request resolved: #917

overview:
https://drive.google.com/file/d/1vHQ4loAUnQccqvc2ChcNLiO09MOoW2ve/view?usp=sharing
detailed:
https://drive.google.com/file/d/1Z5N-UgL1T7yHCkXBcQS0o7t7oaYP4zS2/view?usp=sharing

Similar to:
https://buck2.build/docs/concepts/concept_map/

Reviewed By: dbort

Differential Revision: D50202564

fbshipit-source-id: ba4e4845f202c8133d52264c02e10442ffe76e9b

Author: lucylq

docs/source/_static/img/concepts-map-detailed.png

@@ -1,6 +1,13 @@
 # ExecuTorch Concepts
 This page provides an overview of key concepts and terms used throughout the ExecuTorch documentation. It is intended to help readers understand the terminology and concepts used in PyTorch Edge and ExecuTorch.
 
+## Concepts Map
+![](./_static/img/concepts-map-overview.png)
+
+<a href="./_static/img/concepts-map-overview.png" target="_blank">View in full size</a>
+
+<a href="./_static/img/concepts-map-detailed.png" target="_blank">View detailed concept map</a>
+
 ## [AOT (Ahead of Time)](./getting-started-architecture.md#program-preparation)
 
 AOT generally refers to the program preparation that occurs before execution. On a high level, ExecuTorch workflow is split into an AOT compilation and a runtime. The AOT steps involve compilation into an Intermediate Representation (IR), along with optional transformations and optimizations.