Describe the bug

Command groups defined in cobra are not being accounted for or displayed in the same manner when using the fang library. The hierarchical organization and visual grouping of commands that works correctly in pure cobra implementations is lost when using fang as a wrapper.

Setup

Please complete the following information along with version numbers, if applicable.

• OS: macOS
• Shell: zsh
• Terminal Emulator: ghostty
• Terminal Multiplexer: tmux
• Go Version: v1.24.3
• Cobra Version: v1.9.1

Note: you might encounter rendering issues if your locale does not use
UTF-8 encoding. Please check your locale (locale on POSIX systems) to
see what encoding is being used by your system.

To Reproduce

Steps to reproduce the behavior:

1. Create a cobra CLI application with command groups using cobra.Group
2. Define multiple commands and assign them to different groups
3. Wrap the cobra application with fang
4. Run the help command to view command organization
5. Compare output with pure cobra implementation

Source Code

package main

import (
    "fmt"
    "os"

    "github.com/spf13/cobra"
    // Assuming fang import here
)

func main() {
    // Define command groups
    dataGroup := cobra.Group{
        ID:    "data",
        Title: "Data Commands:",
    }

    utilGroup := cobra.Group{
        ID:    "util",
        Title: "Utility Commands:",
    }

    rootCmd := &cobra.Command{
        Use:   "myapp",
        Short: "My application CLI",
    }

    // Add groups to root command
    rootCmd.AddGroup(&dataGroup, &utilGroup)

    // Data commands
    fetchCmd := &cobra.Command{
        Use:     "fetch",
        Short:   "Fetch data from source",
        GroupID: dataGroup.ID,
        Run: func(cmd *cobra.Command, args []string) {
            fmt.Println("Fetch command executed")
        },
    }

    processCmd := &cobra.Command{
        Use:     "process",
        Short:   "Process data files",
        GroupID: dataGroup.ID,
        Run: func(cmd *cobra.Command, args []string) {
            fmt.Println("Process command executed")
        },
    }

    // Utility commands
    configCmd := &cobra.Command{
        Use:     "config",
        Short:   "Manage configuration",
        GroupID: utilGroup.ID,
        Run: func(cmd *cobra.Command, args []string) {
            fmt.Println("Config command executed")
        },
    }

    statusCmd := &cobra.Command{
        Use:     "status",
        Short:   "Show application status",
        GroupID: utilGroup.ID,
        Run: func(cmd *cobra.Command, args []string) {
            fmt.Println("Status command executed")
        },
    }

    rootCmd.AddCommand(fetchCmd, processCmd, configCmd, statusCmd)

    // Pure cobra execution works correctly
    if err := rootCmd.Execute(); err != nil {
        os.Exit(1)
    }

    // When wrapped with fang, groups are not displayed properly
    // fang.Execute(rootCmd) // Groups lost here
}

Expected behavior

When using pure cobra, the help output should display commands organized by their groups:

Available Commands:
  help        Help about any command

Data Commands:
  fetch       Fetch data from source
  process     Process data files

Utility Commands:
  config      Manage configuration
  status      Show application status

Actual behavior

When using fang, the command groups are not preserved and commands appear in a flat list without the group organization:

Available Commands:
  help        Help about any command
  fetch       Fetch data from source
  process     Process data files
  config      Manage configuration
  status      Show application status

Screenshots

Additional context

This issue affects the user experience significantly as command groups provide important visual organization for CLI applications with many commands. The fang library appears to be processing cobra commands in a way that strips or ignores the GroupID assignments and group definitions.

The bug likely stems from fang's command processing logic not accounting for:

1. cobra.Group definitions added to the root command
2. GroupID assignments on individual commands
3. The help template rendering that displays grouped commands

This makes fang incompatible with modern cobra applications that rely on command grouping for better UX.