Remove unused imports and improve code clarity

[Copilot]

Cleanup pass to remove unused imports, dead code, and replace short-circuit boolean patterns with explicit conditionals.

Changes

• Removed unused imports

  • communicator.py: numpy, set_qubit_state, BroadcastChannelBySockets
  • cli.py: subprocess

• Removed dead code

  • Deleted commented BroadcastChannelBySockets instantiation

• Replaced short-circuit conditionals with explicit if statements

  # Before
  bit and communicator.ghz_qubit.X()
  
  # After  
  if bit:
      communicator.ghz_qubit.X()

• Added version attribute

  • __init__.py: Added __version__ = "0.1.0" for programmatic access

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Remove unused imports and dead code</issue_title>
<issue_description>## Description

Affected files

File	Unused imports
communicator.py	numpy, set_qubit_state, BroadcastChannel, BroadcastChannelBySockets
cli.py	subprocess

Unresolved commented code

# self.broadcast_channel = BroadcastChannelBySockets(...)

Unreadable hacks

# Before (short-circuit as conditional)
bit and communicator.ghz_qubit.X()

# After (explicit)
if bit:
    communicator.ghz_qubit.X()

Other

• Missing __version__ accessible in netqmpi/__init__.py

Impact

• Severity: Low
• Improvement: Code cleanliness and readability</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Remove unused imports and dead code #8

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