Boot phase: Add more error handling + provide verbose output in error cases (#2020)

* WLAN: add error handling

* WLAN: parameter global struct

* WLAN.ini -> more info text

* RSSIThreshold

* Rename logs

* Boot process: error handling

* Update texts

* Comments

* Init sequence

* Prepare for check dir creation

* add check makedir, update logs

* Blink code for OTA+SoftAP

* Blink code for missing time snyc

* Update

* reboot -> switch LED off

* Update log texts

* Update

* Update log texts

* create empty default folders at startup

* Update

* Adapt log level

* Print log level switch

* Update

* Update text

* Add SD free space to log

* WIFI/MQTT disconnect message set to WARN (+ ERROR)

code/components/jomjol_logfile/ClassLogFile.h

@@ -35,7 +35,7 @@ public:
 
     void CloseLogFileAppendHandle();
 
-    void CreateLogDirectories();
+    bool CreateLogDirectories();
     void RemoveOldLogFile();
     void RemoveOldDataLog();