v1.4.0 to add support to RP2040-based boards

### Major Release v1.4.0

1. Add support to RP2040-based boards, such as **RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040**, using [**Earle Philhower's arduino-pico** core](https://github.com/earlephilhower/arduino-pico).
2. Add support to RP2040-based boards, such as **RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040**, using [**Arduino-mbed RP2040** core](https://github.com/arduino/ArduinoCore-mbed).
3. Update `Packages' Patches`
4. Add `LibraryPatches` for [**Adafruit_MQTT_Library**](https://github.com/adafruit/Adafruit_MQTT_Library) to fix compiler error for RP2040-based and many other boards.

README.md

@@ -1535,7 +1535,7 @@ uint16_t NUM_MENU_ITEMS = 0;
 
 #### 1. SAMD_WiFiNINA on Nano-33-IoT
 
-This is the terminal output when running [**SAMD_WiFiNINA**](examples/SAMD_WiFiNINA) example on **AMD NANO_33_IOT**:
+This is the terminal output when running [**SAMD_WiFiNINA**](examples/SAMD_WiFiNINA) example on **SAMD NANO_33_IOT**:
 
 #### 1.1 Open Config Portal
 
@@ -1887,7 +1887,7 @@ MQTT Server = new_mqtt.duckdns.org
 
 #### 2. RP2040_WiFiNINA_MQTT on MBED NANO_RP2040_CONNECT
 
-This is the terminal output when running [**SAMD_WiFiNINA**](examples/SAMD_WiFiNINA) example on **AMD NANO_33_IOT**:
+This is the terminal output when running [**RP2040_WiFiNINA_MQTT**](examples/RP2040_WiFiNINA_MQTT) example on **MBED NANO_RP2040_CONNECT**:
 
 #### 2.1 No Config Data => Config Portal