Implement output/clipboard interfaces, stub implementations, and implement execute()s for Copy and Paste

src/index.ts

@@ -5,6 +5,7 @@ import {Lexer} from "./vm/lexer.js";
 import {Parser} from "./vm/parser.js";
 import {commands} from "./vm/commands/index.js";
 import {Executor} from "./vm/vm.js";
+import {ConsoleDisplay, FakeClipboard, OutputManager} from "./vm/output.js";
 
 const lifecycle = new Lifecycle()
 const input = new Input()
@@ -17,8 +18,13 @@ lexer.subscribe(token => log.verbose('token', token))
 const parser = new Parser(commands, lexer)
 parser.subscribe(exec => log.verbose('exec', exec))
 
-const exec = new Executor(parser)
-exec.subscribe(state => state.output())
+const output: OutputManager = {
+    display: new ConsoleDisplay,
+    clipboard: new FakeClipboard,
+}
+
+const exec = new Executor(output, parser)
+exec.subscribe(state => state.outputSubject())
 
 input.setupPrompt()