kosmorro: add page (#4498)

pages/common/kosmorro.md

@@ -0,0 +1,20 @@
+# kosmorro
+
+> Compute the ephemerides and the events for a given date, at a given position on Earth.
+> More information: <http://kosmorro.space>.
+
+- Get ephemerides for Paris, France:
+
+`kosmorro --latitude={{48.7996}} --longitude={{2.3511}}`
+
+- Get ephemerides for Paris, France, in the UTC+2 timezone:
+
+`kosmorro --latitude={{48.7996}} --longitude={{2.3511}} --timezone={{2}}`
+
+- Get ephemerides for Paris, France, on June 9th, 2020:
+
+`kosmorro --latitude={{48.7996}} --longitude={{2.3511}} --date={{2020-06-09}}`
+
+- Generate a PDF (note: TeXLive must be installed):
+
+`kosmorro --format={{pdf}} --output={{path/to/file.pdf}}`