Added WebSerialLite: a lightweight high-performance version of WebSerial #84

Job	Run time
arduino package_esp32_index.json	3m 39s
pio esp32dev\|arduino	2m 26s
arduino package_esp32_dev_index.json	3m 42s
pio esp32dev\|arduino-2	2m 33s
arduino package_esp8266com_index.json	2m 5s
pio esp32dev\|arduino-3	4m 3s
pio esp32-s3-devkitc-1\|arduino	2m 34s
pio esp32-s3-devkitc-1\|arduino-2	2m 36s
pio esp32-s3-devkitc-1\|arduino-3	4m 12s
pio huzzah\|espressif8266	3m 3s
	30m 53s

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