Please add script example for eZB MD3 to documentation

[hwansing]

@ re PR: arendst/tasmota#

I missed a script example for the eZB MD3 (SML) smartmeter. So I had to work it out by myself, and here it is. Please add it to https://tasmota.github.io/docs/Smart-Meter-Interface/

D B =>sensor53 r M 1 +1,3,s,0,9600,Smartmeter 1,77070100010800ff@100000000,Total consumption,KWh,Total_in,3 1,77070100020800ff@100000000,Total generation,KWh,Total_out,3 1,77070100100700ff@1,Power L1+L2+L3,W,P_L1_L2_L3,18 1,77070100240700ff@1,Power L1,W,P_L1,18 1,77070100380700ff@1,Power L2,W,P_L2,18 1,770701004C0700ff@1,Power L3,W,P_L3,18

[hwansing]

Hmm, sadly the formatting was broken in the input field. So add it here as a txt file: script.txt