feat: rewrite to accept json data from cli args other than env var (#7)

* update readme

sh/get_current_time.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -e
+
+# @describe Get the current time.
+
+main() {
+    date
+}
+
+eval "$(argc --argc-eval "$0" "$@")"
+

sh/may_execute_command.sh

@@ -2,7 +2,7 @@
 set -e
 
 # @describe Executes a shell command.
-# @option --command~ Command to execute, such as `ls -la`
+# @option --command! Command to execute, such as `ls -la`
 
 main() {
     eval "$argc_command"