v1.7.0 to convert to h-only style

### Releases v1.7.0

1. Convert to `h-only` style
2. Add `multiFileProject` examples to demo for multiple-file projects

Author: khoih-prog

README.md

@@ -292,7 +292,7 @@ in many files. But be sure to use the following `.h` file **in just 1 `.h`, `.cp
 #include "MySQL_Generic.h"           //https://github.com/khoih-prog/MySQL_Generic
 ```
 
-Check the new [**multiFileProject** example](examples/multiFileProject) for a `HOWTO` demo.
+Check the new [**multiFileProject_Ethernet** example](examples/multiFileProject[multiFileProject_Ethernet](examples/Ethernet/multiFileProject_Ethernet)) for a `HOWTO` demo.
 
 Have a look at the discussion in [Different behaviour using the src_cpp or src_h lib #80](https://github.com/khoih-prog/ESPAsync_WiFiManager/discussions/80)
 

library.json

@@ -1,6 +1,6 @@
 {
   "name": "MySQL_MariaDB_Generic",
-  "version": "1.6.1",
+  "version": "1.7.0",
   "keywords": "Communication, Database, Storage, MySQL, MariaDB, wt32-eth01, Teensy, SAMD, nRF52, W5x00, Ethernet, wifi, wifinina, lan8720, rp2040, nano-33-iot, nano-rp2040-connect, QNEthernet, native-ethernet, Portenta-H7, SAM DUE, ENC28J60, rpi-pico, Arduino, AVR",
   "description": "Connects to MySQL or MariaDB using ESP8266/ESP32, WT32_ETH01 (ESP32 + LAN8720A), nRF52, SAMD21/SAMD51, STM32F/L/H/G/WB/MP1, Teensy, SAM DUE, Mega, RP2040-based boards, Portenta_H7, etc. with W5x00, ENC28J60 Ethernet, Teensy 4.1 NativeEthernet/QNEthernet, WiFiNINA modules/shields or Portenta_H7 WiFi/Ethernet. W5x00 can use Ethernet, EthernetLarge, Ethernet2 or Ethernet3 library. ENC28J60 can use either EthernetENC or UIPEthernet Library. Now accepting server's hostname, besides IPAddress",
   "authors": [