feat(asc): add json schema cmd and output

This commit adds a command to output a JSON Schema for the
applications.yaml file maintained in the
komorebi-application-specific-configuration repo, and also adds an
up-to-date version of the JSON Schema as a file in the root of this
repository so that users can reference it as an autocompletion source.

komorebi-core/src/lib.rs

@@ -155,6 +155,7 @@ pub enum SocketMessage {
     ToggleTitleBars,
     AddSubscriber(String),
     RemoveSubscriber(String),
+    ApplicationSpecificConfigurationSchema,
     NotificationSchema,
     SocketSchema,
     StaticConfigSchema,