Adding schematic for network settings

Author: igorpecovnik

tools/include/markdown/NE002-header.md

@@ -0,0 +1,13 @@
+``` mermaid
+graph LR
+  A[Network] --> B[Add / Change interface];
+  A[Network] --> O[Revert to defaults];
+  A[Network] --> P[Show configuration];
+  B ---->E[Wired];
+  B ---->F[Wireless];
+  E -->R[DHCP];
+  E -->T[Static];
+  E -->S[Spoof MAC];
+  F -->X[Station];
+  F -->W[Access point]; 
+```