Reformulate both MEGNetDataset and M3GNetDataset classes, minor optimizations in compute.py and minor refactoring in _graph_convolution.py #1102

	name: Linting

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	max-parallel: 4
	matrix:
	python-version: ["3.10"]

	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	pip install --quiet -r requirements-ci.txt
	- name: ruff
	run: \|
	ruff --version
	ruff check matgl
	- name: black
	run: \|
	black --version
	black --check --diff --color matgl
	- name: mypy
	run: \|
	mypy --version
	rm -rf .mypy_cache
	mypy matgl

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