Added demo to table (#390)

* Initial demo page commit

* added image

* Update index.md

* Update _docs/tutorials/demos/edgeimpulse_demo/index.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

* Update _docs/tutorials/demos/edgeimpulse_demo/index.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

* changed folder name to omit _demo

* Removed "_demo" in folder name appearances within header

* Updated table in overview

* Update index.md

* Update index.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

Author: avibrown

_docs/tutorials/demos/overview/index.md

@@ -21,10 +21,12 @@ Choose yourself:
 | [**DemoBox Power and Boot Time**](../demobox_demo/) | <img src="olimex.png" width="35%" style="margin:auto;"/> | NuttX | Olimex LTD STM32-E407, Raspberry Pi 4 |
 | [**Thumper, a six-wheeled robot**](../thumper_demo/) | <img src="thumper.png" width="45%" style="margin:auto;"/> | NuttX | Wild Thumper 6WD, Olimex LTD STM32-E407 |
 | [**MoveIt 2 Demo**](../moveit2_demo/) | <img src="tof_sensor.png" style="margin:auto;"/> | Zephyr | STM32L4 Discovery kit IoT |
+| [**Edge Impulse AI demo**](../edgeimpulse/) | <img src="portenta.png" width="40%" style="margin:auto;"/> | Arduino | Arduino Portenta H7, Vision shield |
 | [**Combined Demos**](../combined_demos/) | -- | -- |
 
 <div style="font-size:80%;color:gray;text-align:right;margin-bottom:1em;">*As a matter of course, in addition to the hardware detailed above, you'll need a computer/laptop, various cables, and further auxiliary equipment.</div>
 
 **WIP:** The demos may also interface with the FIWARE Context Broker, which is the core of the [FIWARE](https://www.fiware.org/) open source initiative for context data management. Learn more at [**Interfacing with FIWARE Context Broker**](../fiware_demo/).
 
 **WIP:** The demos can be combined in several ways to demonstrate further functionalities. Go to [**Combined Demos**](../combined_demos/) to learn more about these combinations and how to launch them.
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