chore: add tox lint, format and test environments

tox.ini

@@ -0,0 +1,47 @@
+[tox]
+requires =
+    tox>=4.19
+env_list =
+    unit-py3{9-13}
+    smoke-py3{9-13}
+    lint
+    format
+
+[testenv]
+deps =
+    ../posix-sdc
+    .
+
+[testenv:lint]
+description = run type check on code base
+labels = static
+deps =
+    mypy
+commands =
+    mypy src tests --junit-xml test-reports/{env_name}.xml
+
+[testenv:format]
+description = check formatting
+labels = static
+deps =
+    autopep8
+commands =
+    autopep8 --diff --exit-code src tests
+
+[testenv:unit-py3{9-13}]
+description = run unit tests
+labels = unit
+deps =
+    {[testenv]deps}
+    pytest
+commands =
+    pytest tests/unit --junitxml=test-reports/{env_name}.xml
+
+[testenv:smoke-py3{9-13}]
+description = run smoke tests against the console entry points
+labels = smoke
+deps =
+    {[testenv]deps}
+    pytest
+commands =
+    pytest tests/smoke --junitxml=test-reports/{env_name}.xml