fix: enable positional options so -o works on subcommands

Remove global -o/--output from parent program and enable
enablePositionalOptions() so -o yaml/json is parsed by subcommands.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/tests/cli.test.ts

@@ -24,9 +24,10 @@ describe('createProgram', () => {
     expect(status).toBeDefined();
   });
 
-  it('has output option', () => {
+  it('subcommands have output option', () => {
     const program = createProgram();
-    const opt = program.options.find((o) => o.long === '--output');
+    const get = program.commands.find((c) => c.name() === 'get');
+    const opt = get?.options.find((o) => o.long === '--output');
     expect(opt).toBeDefined();
   });