feat(app): Make ancv available as an installable script

`pip install ancv` will also make `ancv` available as a command,
if Python scripts of the Python interpreter used to run `pip` are on the `PATH`

pyproject.toml

@@ -63,6 +63,9 @@ pytest-aiohttp = "^1.0.4"
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
+[tool.poetry.scripts]
+ancv = "ancv.__main__:app"
+
 [tool.coverage.run]
 branch = true