moving solvers related code to solvers/* directory, improving fista and nnls_hals #476

	name: Lint with Black

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.10'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install black
	- name: Lint with Black
	run: \|
	black --check --diff --color ./tensorly

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