fix(cli): add explicit helpOption configuration for consistent help-flag ordering

Add explicit .helpOption('-h, --help') call to the Commander program configuration so the help option is explicitly defined rather than relying on Commander.js lazy initialization. Add corresponding test to pin the behavior.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/cli/cli-program.ts

@@ -20,6 +20,7 @@ program
   .name("oh-my-opencode")
   .description("The ultimate OpenCode plugin - multi-model orchestration, LSP tools, and more")
   .version(VERSION, "-v, --version", "Show version number")
+  .helpOption("-h, --help", "Display help for command")
   .enablePositionalOptions()
 
 program