jc: add page (#4089)

pages/common/jc.md

@@ -0,0 +1,20 @@
+# jc
+
+> A utility to convert the output of multiple commands to JSON.
+> More information: <https://github.com/kellyjonbrazil/jc>.
+
+- Convert command output to JSON via pipe:
+
+`{{ifconfig}} | jc {{--ifconfig}}`
+
+- Convert command output to JSON via magic syntax:
+
+`jc {{ifconfig}}`
+
+- Output pretty JSON via pipe:
+
+`{{ifconfig}} | jc {{--ifconfig}} -p`
+
+- Output pretty JSON via magic syntax:
+
+`jc -p {{ifconfig}}`