Fix missing entry points in pyproject.toml for optimum-cli export executorch

[seyeong-han]

Summary

Fixes the optimum-cli export executorch command not being recognized after editable installation.

When installing optimum-executorch in editable mode, users encountered:

optimum-cli export: error: argument {onnx,tflite}: invalid choice: 'executorch' (choose from 'onnx', 'tflite')

Root Cause

The pyproject.toml was missing the entry points configuration required for optimum to discover and register the executorch export subcommand. While the registration code existed in optimum/commands/register/register_export.py, it was never wired up via the package's entry points.

Changes

Added the missing entry points configuration to pyproject.toml:

[project.entry-points."optimum.commands.register"]
executorch = "optimum.commands.register.register_export:REGISTER_COMMANDS"

This enables optimum-cli to discover and load the ExecuTorchExportCommand during startup.

Testing

Verified the entry point is properly registered after reinstallation:

from importlib.metadata import entry_points
eps = entry_points()
print([ep for ep in eps.get('optimum.commands.register', [])])
# Output: [EntryPoint(name='executorch', value='optimum.commands.register.register_export:REGISTER_COMMANDS', group='optimum.commands.register')]