Migrate to pyproject.toml (PEP 621) and fix Python version requirement

[Copilot]

setup.py is deprecated. Python version requirement was >=3.6 but NetQASM requires >=3.8.

Changes

• Migrated packaging configuration to pyproject.toml (PEP 621)
• Updated requires-python from >=3.6 to >=3.8
• Removed setup.py

Configuration

[project]
name = "netqmpi"
version = "0.1.0"
requires-python = ">=3.8"
dependencies = ["netqasm~=1.0.0", "numpy~=1.24.3"]

[project.optional-dependencies]
test = ["pytest>=7.0"]

[project.scripts]
netqmpi = "netqmpi.runtime.cli:main"

All metadata, dependencies, and entry points preserved from original setup.py.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Migrate from setup.py to pyproject.toml (PEP 621)</issue_title>
<issue_description>## Description

File: setup.py → pyproject.toml

Problem

setup.py is deprecated in favor of pyproject.toml (PEP 621). The python_requires='>=3.6' is too permissive (NetQASM requires >= 3.8).

Solution

Migrate to pyproject.toml:

[project]
name = "netqmpi"
version = "0.1.0"
requires-python = ">=3.8"
dependencies = ["netqasm~=1.0.0", "numpy~=1.24.3"]

[project.optional-dependencies]
test = ["pytest>=7.0"]

[project.scripts]
netqmpi = "netqmpi.runtime.cli:main"

Impact

• Severity: Low
• Improvement: Packaging modernization</issue_description>

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

• Fixes Migrate from setup.py to pyproject.toml (PEP 621) #7

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