BREAKING CHANGE: change config output format. Join commands with ; instead of using JSON array

Reason: it better fits into a future with built-in shell-like combinators #278

Before:

    $ aerospace config --get mode.service.binding --json
    {
      "alt-shift-k" : [
        "join-with up",
        "mode main"
      ],
      "backspace" : [
        "close-all-windows-but-current",
        "mode main"
      ],
      ...
    }

After:

    $ aerospace config --get mode.service.binding --json
    {
      "alt-shift-h" : "join-with left; mode main",
      "esc" : "mode main; reload-config",
      "alt-shift-k" : "join-with up; mode main",
      "r" : "flatten-workspace-tree; mode main",
      "backspace" : "close-all-windows-but-current; mode main",
      "alt-shift-j" : "join-with down; mode main",
      "f" : "layout floating tiling; mode main",
      "alt-shift-l" : "join-with right; mode main"
    }

Raycast extension doesn't depend on this API yet, so it should be fine
to break it #215

Author: nikitabobko

Sources/AppBundle/command/query/ConfigCommand.swift

@@ -143,7 +143,7 @@ extension ConfigMapValue {
 func buildConfigMap() -> ConfigMapValue {
     let mode = config.modes.mapValues { (mode: Mode) -> ConfigMapValue in
         let binding: [String: ConfigMapValue] = mode.bindings.mapValues { binding in
-            .array(binding.commands.map { .scalar(.string($0.args.description)) })
+            .scalar(.string(binding.commands.map { $0.args.description }.joined(separator: "; ")))
         }
         return .map(["binding": .map(binding)])
     }