ansiweather: add page (#2539)

pages/common/ansiweather.md

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+# ansiweather
+
+> A shell script for displaying the current weather conditions in your terminal.
+
+- Display a forecast using metric units for the next five days for Rzeszow, Poland:
+
+`ansiweather -u {{metric}} -f {{5}} -l {{Rzeszow,PL}}`
+
+- Display a forecast showing symbols and daylight data for your current location:
+
+`ansiweather -s {{true}} -d {{true}}`
+
+- Display a forecast showing wind and humidity data for your current location:
+
+`ansiweather -w {{true}} -h {{true}}`