Merge pull request #18346 from arielyang/3.0

docs: add TDengine Knowledge Map

docs/en/05-get-started/index.md

@@ -20,6 +20,17 @@ import {useCurrentSidebarCategory} from '@docusaurus/theme-common';
 <DocCardList items={useCurrentSidebarCategory().items}/>
 ```
 
+## Study TDengine Knowledge Map
+
+The TDengine Knowledge Map covers the various knowledge points of TDengine, revealing the invocation relationships and data flow between various conceptual entities. Learning and understanding the TDengine Knowledge Map will help you quickly master the TDengine knowledge system.
+
+<figure>
+<center>
+<a href="pathname:///img/tdengine-map.svg" target="_blank"><img src="/img/tdengine-map.svg" width="80%" /></a>
+<figcaption>Diagram 1. TDengine Knowledge Map</figcaption>
+</center>
+</figure>
+
 ### Join TDengine Community
 
 <table width="100%">