Migrate setup.cfg into pyproject.toml

Only flake8 does not support pyproject.toml so it stays for now

Author: JoshMock

pyproject.toml

@@ -55,3 +55,18 @@ path = "elasticsearch_serverless/__init__.py"
 include = [
     "/elasticsearch_serverless",
 ]
+
+[tool.pytest]
+junit_family = "legacy"
+addopts = "-vvv -p no:logging --cov-report=term-missing --cov=elasticsearch --cov-config=.coveragerc"
+
+[tool.isort]
+profile = "black"
+
+[tool.coverage.report]
+exclude_lines = [
+    "raise NotImplementedError*",
+]
+
+[tool.mypy]
+ignore_missing_imports = true

setup.cfg

@@ -1,16 +1,2 @@
 [flake8]
 ignore = E203, E266, E501, W503
-
-[tool:pytest]
-junit_family=legacy
-addopts = -vvv -p no:logging --cov-report=term-missing --cov=elasticsearch --cov-config=.coveragerc
-
-[tool:isort]
-profile=black
-
-[report]
-exclude_lines=
-    raise NotImplementedError*
-
-[mypy]
-ignore_missing_imports = True