Added Commands Management

src/myfasthtml/icons/Readme.md

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+# Generate Icons
+
+Create the icons files for FastHtml applications.
+
+## How to generate the svg files
+```sh
+npm i -D @sicons/fa
+npm i -D @sicons/fluent
+npm i -D @sicons/ionicons4
+npm i -D @sicons/ionicons5
+npm i -D @sicons/antd
+npm i -D @sicons/material
+npm i -D @sicons/tabler
+npm i -D @sicons/carbon
+```
+Update the root folder in `update_icons.py` to point to the root folder of the icons.
+
+## 
+```sh
+python update_icons.py
+```