v1.4.0 for Portenta_H7

### Initial Release v1.4.0

1. Add support to Portenta_H7 boards, using [`ArduinoCore-mbed mbed_portenta core`](https://github.com/arduino/ArduinoCore-mbed)
2. Update `Packages' Patches`
3. Add `LibraryPatches` for [**Adafruit_MQTT_Library**](https://github.com/adafruit/Adafruit_MQTT_Library) to fix compiler error for Portenta_H7 and many other boards.
4. Bump version to v1.4.0 to sync with [WiFiManager_Generic_Lite library](https://github.com/khoih-prog/WiFiManager_Generic_Lite)

Author: khoih-prog

.gitignore

@@ -0,0 +1,32 @@
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app