Major rework to modernize it

- use Poetry
- use pre-commit
- use pytest
- use reuse
- bring coverage to 100%

Signed-off-by: Aurélien Bompard <[email protected]>

.gitignore

@@ -1,3 +1,4 @@
+**/__pycache__
 *.swp
 *.pyc
 *.egg*

.pre-commit-config.yaml

@@ -0,0 +1,29 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+
+repos:
+  # Generic hooks
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+
+  # https://black.readthedocs.io/en/stable/integrations/source_version_control.html
+  - repo: https://github.com/psf/black
+    rev: 23.10.1
+    hooks:
+      - id: black
+
+  # Ruff
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.1.3
+    hooks:
+      - id: ruff
+  # License headers
+  - repo: https://github.com/fsfe/reuse-tool
+    rev: v2.1.0
+    hooks:
+      - id: reuse

.reuse/dep5

@@ -0,0 +1,22 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: mailman3-fedmsg-plugin
+Upstream-Contact: Fedora Infrastructure <[email protected]>
+Source: https:////github.com/fedora-infra/mailman3-fedmsg-plugin
+
+# Sample paragraph, commented out:
+#
+# Files: src/*
+# Copyright: $YEAR $NAME <$CONTACT>
+# License: ...
+
+Files: *.yaml *.md *.rst *.toml .gitignore *.ini .github/*
+Copyright: Contributors to the Fedora Project
+License: LGPL-3.0-or-later
+
+Files: mailman_schema/*.toml mailman_schema/.gitignore
+Copyright: Contributors to the Fedora Project
+License: LGPL-3.0-or-later
+
+Files: poetry.lock mailman_schema/poetry.lock
+Copyright: None, autogenerated
+License: LGPL-3.0-or-later