feat(cli): add support cmd (#12328)

Part of #12163

- Adds a command coder support bundle <workspace> that generates a 
  support bundle and writes it to coder-support-$(date +%s).zip.
- Note: this is hidden currently until the rest of the functionality is fleshed out.

cli/root.go

@@ -123,6 +123,7 @@ func (r *RootCmd) Core() []*clibase.Cmd {
 		r.vscodeSSH(),
 		r.workspaceAgent(),
 		r.expCmd(),
+		r.support(),
 	}
 }