Add Readme for ssl-vision-cli

Author: g3force

cmd/ssl-vision-cli/Readme.md

@@ -0,0 +1,13 @@
+# ssl-vision-cli
+
+The ssl-vision-cli listens for ssl-vision messages and prints them to the console as JSON.
+
+The output can be processed in Bash with `jq`, for example:
+
+```shell
+# Print t_capture only
+ssl-vision-cli -noGeometry | jq '.t_capture'
+
+# Print t_capture with ball position in csv format
+ssl-vision-cli -noGeometry | jq -r '[.t_capture, .balls[0].x, .balls[0].y] | @csv'
+```