Add info.txt with demo details

resources/platforms/espidf/micro_speech_esp32devboard/info.txt

@@ -0,0 +1,9 @@
+I have used this demo with the following command:
+
+python -m mlonmcu.cli.main flow run micro_speech_custom_ud --backend tvmaot --target esp32c3 -c espidf.project_template=micro_speech_esp32devboard -c espidf.use_idf_monitor=0 -c esp32c3.port=/dev/ttyUSB0 -c espidf.print_outputs=1 -c esp32c3.print_outputs=1
+
+
+ESP-IDF logging is optional
+
+
+TODO: show results on leds, demo feature, print stats