Command flag behavior improvements (#1432)

* Forbid overlap of built-in and command-defined flag names 
* Allow interleaving built-in and command-defined flags on the command
line
* List abbreviated flag names first, matching the behavior of built-in
flags

pkl-commons-cli/src/main/kotlin/org/pkl/commons/cli/commands/BaseOptions.kt

@@ -98,7 +98,17 @@ class BaseOptions : OptionGroup() {
   private val defaults = CliBaseOptions()
 
   private val output =
-    arrayOf("json", "jsonnet", "pcf", "properties", "plist", "textproto", "xml", "yaml")
+    arrayOf(
+      "json",
+      "jsonnet",
+      "pcf",
+      "properties",
+      "plist",
+      "textproto",
+      "xml",
+      "yaml",
+      "pkl-binary",
+    )
 
   val allowedModules: List<Pattern> by
     option(