New v1.5.0 write commands missing from --help output

Description

The new subscriber write commands added in v1.5.0 (via #130) are not listed in the kit subscriber --help output, making them undiscoverable. However, the commands do work when called directly without --help.

Steps to Reproduce

kit subscriber --help

Output:

Subcommands:
  list            List subscribers with filtering
  get             Get detailed subscriber information
  search          Search subscribers
  stats           Show subscriber statistics
  scores          Calculate engagement scores for subscribers
  export          Export subscribers to CSV

The following commands are absent from the list:

• create
• update
• add-tag
• remove-tag
• unsubscribe

Workaround

The commands work when invoked directly, e.g.:

kit subscriber create
kit subscriber add-tag

Both return their usage/options output correctly.

Expected Behavior

All subcommands should appear in kit subscriber --help.

Environment

• Kit CLI version: v1.5.0
• Platform: Linux x64

Start by locating the subscriber command registration and help-output definition, then compare the listed read commands with the v1.5.0 write commands: create, update, add-tag, remove-tag, and unsubscribe. Done means kit subscriber --help lists all five missing commands while their existing direct usage output still works.