Add jc wrapper (#883)

This PR adds `jc` wrapper, so that `jc` output is automatically parsed
into a nushell data structure and you don't have to use `| from json`
filter to parse it.

References: https://kellyjonbrazil.github.io/jc/#jc

modules/jc/mod.nu

@@ -0,0 +1,30 @@
+# Run `jc` (Json Converter)
+#
+# This module provides a wrapper around the `jc` command line tool and automatically
+# parses its output into a structured data format.
+#
+# Dependencies:
+#     * `jc`
+#
+# Installation:
+#     1. Install the `jc` command line: https://kellyjonbrazil.github.io/jc/#installation
+#     2. Import this module in your `config.nu`: `import ~/.local/share/nu_scripts/modules/jc/`
+export def --wrapped main [...args]: [any -> table, any -> record, any -> string] {
+  let run = (^jc ...$args | complete)
+
+  if $run.exit_code != 0 {
+    error make {
+      msg: $run.stderr,
+      label: {
+        text: "jc execution failed",
+        span: (metadata $args).span
+      }
+    }
+  }
+
+  if '--help' in $args or '-h' in $args {
+    $run.stdout
+  } else {
+    $run.stdout | from json
+  }
+}