Complete type annotations (#399)

* feat: Add type annotations to test_linear_expression.py

* refactor: Add type hints to test_model.py functions

* add type annotations to test files

* run mypy succesfully

* feat: Add type annotations to variables module

* complete type annotations, add disallow_untyped_defs to pyproject

* fix: import notimlementedtype from linopy.types

* reinsert py.typed

* Update linopy/constraints.py

Co-authored-by: Lukas Trippe <[email protected]>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* adress review comments

* move None out of DimsLike and CoordsLike

* fix: add pytest fixture

* make typealias python3.9 compatible

* follow up

* follow up

* follow up

* follow up

---------

Co-authored-by: Lukas Trippe <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

linopy/__init__.py

@@ -12,7 +12,6 @@
 # Note: For intercepting multiplications between xarray dataarrays, Variables and Expressions
 # we need to extend their __mul__ functions with a quick special case
 import linopy.monkey_patch_xarray  # noqa: F401
-from linopy import model, remote, types
 from linopy.config import options
 from linopy.constants import EQUAL, GREATER_EQUAL, LESS_EQUAL
 from linopy.constraints import Constraint
@@ -35,9 +34,6 @@
     "Variable",
     "available_solvers",
     "merge",
-    "model",
     "options",
     "read_netcdf",
-    "remote",
-    "types",
 )