1st README draft

README.md

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+# ESP32 capacitance
+
+To connect to wifi, set:
+```c
+#define WIFI_SSID "SSID_NAME"         // Network Name
+#define WIFI_PASSWORD "PASSWORD" // Network Password
+```
+
+And the MQTT host
+
+```c
+#define MQTT_SERVER "mqtt.ammar.engineer"
+#define MQTT_PORT 1883
+```
+
+## Compiling and Uploading
+
+```sh
+pio run -t upload && pio device monitor
+```
+
+# TODO