r.flowaccumulation: Add a new addon that implements the Memory-Efficient Flow Accumulation parallel algorithm (Cho 2023) #1310

	---
	name: Python Black Formatting

	on:
	push:
	branches:
	- grass*
	pull_request:

	jobs:
	run-black:
	name: Black ${{ matrix.black-version }}

	# Using matrix just to get variables which are not environmental variables
	# and also to sync with other workflows which use matrix.
	strategy:
	matrix:
	include:
	- os: ubuntu-22.04
	python-version: '3.10'
	black-version: 22.3.0

	runs-on: ${{ matrix.os }}

	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install
	run: \|
	python -m pip install --upgrade pip
	pip install black==${{ matrix.black-version }}

	- name: Run Black
	run: \|
	black --check --diff .

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