build: use poetry for dependencies management

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+extend-ignore = D1, D204, W292, W293
+docstrings-convention = numpy
+max-complexity = 10

.gitignore

@@ -2,6 +2,7 @@
 test.py
 img/
 sample.beancount
+poetry.lock
 
 # Byte-compiled / optimized / DLL files
 __pycache__/

pyproject.toml

@@ -0,0 +1,37 @@
+[tool.poetry]
+name = "auto-depreciation"
+version = "2.1.0"
+description = "Beancount plugin for fixed assets depreciation"
+authors = ["hktkzyx <hktkzyx@yeah.net>"]
+license = "GPL-3.0-or-later"
+
+[tool.poetry.dependencies]
+python = "^3.9"
+python-dateutil = "^2.8.2"
+beancount = "^2.3.5"
+flake8 = {version = "^4.0.1", optional = true}
+yapf = {version = "^0.32.0", optional = true}
+commitizen = {version = "^2.21.2", optional = true}
+pre-commit = {version = "^2.17.0", optional = true}
+isort = {version = "^5.10.1", optional = true}
+
+[tool.poetry.dev-dependencies]
+mkdocs = "^1.2.3"
+mkdocs-material = "^8.2.1"
+
+[tool.poetry.extras]
+dev-tools = ["flake8", "yapf", "commitizen", "pre-commit", "isort"]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.isort]
+profile = "google"
+
+[tool.yapf]
+based_on_style = "pep8"
+split_before_arithmetic_operator = true
+split_before_named_assigns = false
+indent_dictionary_value = true
+split_all_top_level_comma_separated_values = true