Added type annotations to all functions (#845)

* Added type annotations for 1/5 of the files.

There's bound to be some issues with type miss-match, will sort that out later.

* Added type hints for 4/5 of the code

* Added type hints for 4.7/5 of the code

* Added type hints for 5/5 of the code base

* Split the linters into individual files

This should help with more clearly show which runner is breaking since they don't share a single common name any longer. Also moved mypy settings into pyproject.toml

* Fixed some of the last flake8 issues

* Missing parameter

* Fixed invalid lookahead types

* __future__ had to be at the top

* Fixed last flake8 issues

1 files changed, 16 insertions, 0 deletions

diff --git a/.github/workflows/mypy.yaml b/.github/workflows/mypy.yaml
new file mode 100644
index 00000000..4f4e938c
--- /dev/null
+++ b/.github/workflows/mypy.yaml
@@ -0,0 +1,16 @@
+on: [ push, pull_request ]
+name: mypy type checking
+jobs:
+    mypy:
+        runs-on: ubuntu-latest
+        container:
+            image: archlinux:latest
+        steps:
+            - uses: actions/checkout@v2
+            - run: pacman --noconfirm -Syu python mypy python-pip
+            - run: python -m pip install --upgrade pip
+            - run: pip install fastapi pydantic
+            - run: python --version
+            - run: mypy --version
+            - name: run mypy
+              run: mypy --strict --module archinstall || exit 0
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