Configure mypy to run in virtual environment and fix resulting issues (#989)

For some time I've noticed that my IDE is reporting mypy errors that the
pre-commit hook is not picking up. This is because [mypy
mirror](https://github.com/pre-commit/mirrors-mypy) runs in an isolated
pre-commit environment which does not have dependencies installed and it
enables `--ignore-missing-imports` to avoid errors.

This is [advised against by
mypy](https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-library-stubs-or-py-typed-marker)
for obvious reasons:

> We recommend avoiding --ignore-missing-imports if possible: it’s
equivalent to adding a # type: ignore to all unresolved imports in your
codebase.

This PR configures the mypy pre-commit hook to run in the virtual
environment and addresses the additional errors identified as a result.
It also introduces a minimal mypy config into the `pyproject.toml`

[mypy errors identified without the fixes in this
PR](https://github.com/user-attachments/files/15896693/mypyerrors.txt)

.pre-commit-config.yaml

@@ -16,17 +16,6 @@ repos:
       args: [--fix, --exit-non-zero-on-fix]
     - id: ruff-format
 
-- repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.9.0
-  hooks:
-  - id: mypy
-    additional_dependencies: [types-click]
-    exclude: |
-      (?x)^(
-          kasa/modulemapping\.py|
-      )$
-
-
 - repo: https://github.com/PyCQA/doc8
   rev: 'v1.1.1'
   hooks:
@@ -35,6 +24,18 @@ repos:
 
 - repo: local
   hooks:
+  # Run mypy in the virtual environment so it uses the installed dependencies
+  # for more accurate checking than using the pre-commit mypy mirror
+  - id: mypy
+    name: mypy
+    entry: devtools/run-in-env.sh mypy
+    language: script
+    types_or: [python, pyi]
+    require_serial: true
+    exclude: |  # exclude required because --all-files passes py and pyi
+      (?x)^(
+          kasa/modulemapping\.py|
+      )$
   - id: generate-supported
     name: Generate supported devices
     description: This hook generates the supported device sections of README.md and SUPPORTED.md