Add latching tutorial for Edge Control (#91)

* Added content

* Added Metadata.json

* Updated the structure

* Added images to asset folder

* Updated content for review

* Update package-lock.json

* Added content

* Added Metadata.json

* Updated the structure

* Added images to asset folder

* Updated content for review

* Update package-lock.json

* remove unnecessary notes tag

* Tutorial revision

Revision

* Review tutorial

Further corrections.

* Proofread Content

* Installed the Validation tool

* Remove colon from "you will learn" section

* remove colon

* Reviewed Ernesto's content

* Updated Download_core image

* Resolved Conflicts

* Removed Image From Content

* Updated to Title Case

* Update metadata.json

* Changed image with new core features

* Added link to the Mbed-Core Repo

* Update content.md

* Removed metadata.json

* Changed section number

* Added front matter to the tutorial

* Removed unused images

* Create ec_ard_3wirevalve_cover.svg

* Corrected validation errors

* Corrected signature errors

* Corrected validation errors

* Corrected Validation Errors

* Corrected signature formats

* Corrected validation error

* Corrected validation errors

* Minor rephrasing

Co-authored-by: ErnestoELC <e.lopez@arduino.cc>
Co-authored-by: Sebastian Romero <s.hunkeler@arduino.cc>

Lora ard tutorial update (#113)

* Updated tutorial content and assets

* Minor rephrasing and added script

* Revisions from review

Lora tutorial update (#112)

* Cleaned up and fixed image text

* Fixed text for new layout

* Replaced old images and text

* Small redundancy fix

* Minor rephrasing

* Add script to obtain Dev EUI

Co-authored-by: Sebastian Romero <s.hunkeler@arduino.cc>

Fix missing token in metadata file

Add correct USB cable

Add Edge Control to material list

Edge control Getting Started fixes (#104)

* Remove mention of library manager

* Add edge control getting started to list

* Fix incorrect image caption

Rephrase image caption in ML tutorial

Update metadata of flash tutorial

Fix typo in LVGL tutorial