docs(iot): create diagram class

IOT/docs/diagram/class.puml

@@ -0,0 +1,24 @@
+@startuml Class Diagram
+
+
+Class API {
+    - user: String
+    - password: String
+    - serveurHost: String
+    - https: bool
+    - client: WiFiEspClient*
+    - connect(): bool
+    + API(user: String, password: String, host: String, https: bool = true)
+    + wifiBegin(wifiId: String, wifiPass: String, espSerial: Stream*): bool
+    + sendValue(val: String, pouvelleID: String, unit: String, full: bool): bool
+}
+
+Class Program {
+    + Program ()
+    + setup()
+}
+
+
+
+
+@enduml