doc: add readme, library.properties, keywords

Author: leonardocavagnis

libraries/Arduino_H7_Video/README.md

@@ -0,0 +1,5 @@
+# 📺 Arduino H7 Video Library
+
+The Arduino H7 Video Library manages the video output on Arduino boards based on the STM32H7 microcontroller (Portenta H7, GIGA R1 WiFi), providing functions to draw on the screen and integrate third-party video libraries such as [LVGL](https://lvgl.io/) and [emWin](https://www.segger.com/products/user-interface/emwin/).
+
+📖 For more information about this library, please refer to the documentation [here](./docs/).

libraries/Arduino_H7_Video/keywords.txt

@@ -0,0 +1,26 @@
+##################################################
+# Syntax Coloring Map For Arduino_H7_Video
+##################################################
+# Class
+##################################################
+
+Arduino_H7_Video KEYWORD1
+
+##################################################
+# Methods and Functions 
+##################################################	
+
+begin	    KEYWORD2
+end	        KEYWORD2
+
+width       KEYWORD2
+height      KEYWORD2
+
+clear       KEYWORD2
+beginDraw   KEYWORD2
+endDraw     KEYWORD2
+set         KEYWORD2
+
+##################################################
+# Constants
+##################################################

libraries/Arduino_H7_Video/library.properties

@@ -2,8 +2,8 @@ name=Arduino_H7_Video
 version=1.0
 author=Arduino
 maintainer=Arduino <info@arduino.cc>
-sentence=video primitives for Portenta H7 and Giga R1
+sentence=Video library for Arduino boards based on the STM32H7 microcontroller
 paragraph=
 category=Display
-url=https://github.com/arduino/ArduinoCore-mbed/tree/master/libraries/Arduino_H7_Video
+url=https://github.com/arduino/ArduinoCore-mbed/tree/main/libraries/Arduino_H7_Video
 architectures=mbed,mbed_portenta,mbed_giga