added an example for mutable_instance usage #1

	name: examples
	on:
	push:
	branches:
	- '*'
	paths:
	- src/**
	- examples/**
	- pyproject.toml

	jobs:
	run_examples:
	name: Build the library
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11", "3.12"]

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install build

	- name: Build the library for ${{ matrix.python-version }}
	run: \|
	python -m build

	- name: Install library
	run: \|
	python -m pip install dist/pyconstclasses-*-py3-none-any.whl --force-reinstall

	- name: Run the example programs
	run: \|
	for program in examples/*.py; do
	echo "-> $program"
	python "$program"
	echo ""
	done

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