Add woodpecker ci pipeline

Added basic continuous integration tests to run on any push.

On main branch, the python program is built.
On tagged commit, a gitea release is created.

Fixed build pipeline issues:

Ignored the typeless library imports nox and metadata_version since they
are for development testing and too old of a python version
respectively.

Fixed two small typing errors for repetitions.

.woodpecker.yml

@@ -0,0 +1,60 @@
+# branches: main
+
+pipeline:
+  unit_tests:
+    image: mquade/poetry:3.9-1.1.11
+    commands:
+      - poetry config virtualenvs.create false
+      - poetry install
+      - pytest
+
+  code_lint:
+    image: mquade/poetry:3.9-1.1.11
+    commands:
+      - poetry config virtualenvs.create false
+      - poetry install
+      - pip install black
+      - black .
+
+  static_analysis:
+    image: mquade/poetry:3.9-1.1.11
+    commands:
+      - poetry config virtualenvs.create false
+      - poetry install
+      - pip install mypy
+      - mypy .
+
+  build_dist:
+    image: mquade/poetry:3.9-1.1.11
+    commands:
+      - poetry config virtualenvs.create false
+      - poetry install
+      - poetry build
+    when:
+      branch: main
+
+  gitea_release:
+    image: plugins/gitea-release
+    settings:
+      api_key: 
+        from_secret: gitea_release_token
+      base_url: https://git.martyoeh.me
+      files: dist/*
+    when:
+      branch: main
+      event: tag
+      tag: v*
+
+  notify_matrix:
+    image: plugins/matrix
+    settings:
+      homeserver: https://matrix.org
+      roomid:
+        from_secret: matrix_roomid
+      userid:
+        from_secret: matrix_userid
+      accesstoken:
+        from_secret: matrix_token
+    when:
+      status: [ success, failure ]
+

noxfile.py

@@ -1,4 +1,4 @@
-import nox
+import nox  # type: ignore
 
 
 @nox.session(python=["3.7", "3.8", "3.9"])

src/habitmove/__init__.py

@@ -4,6 +4,6 @@ import sys
 try:
     from importlib.metadata import version as metadata_version
 except ImportError:
-    from importlib_metadata import version as metadata_version
+    from importlib_metadata import version as metadata_version  # type: ignore
 
 __version__ = str(metadata_version(__name__))

src/habitmove/repetitions.py

@@ -55,9 +55,10 @@ def habit_list_add_ids(c: sqlite3.Cursor, habitlist: list[Habit]) -> dict[int, H
     :return habit_id_dict: The habit collection as a dict with the keys
                                  consisting of the habit's sqlite database ID.
     """
-    with_id = {}
+    with_id: dict[int, Habit] = {}
     for h in habitlist:
         sql_id = fetch_habit_id(c, h.uuid or "")
+        if sql_id is not None:
             with_id[sql_id] = h
 
     return with_id
@@ -74,6 +75,8 @@ def fetch_habit_id(cursor: sqlite3.Cursor, uuid: str) -> Optional[int]:
     if id is not None:
         return id[0]
 
+    return None
+
 
 def add_to_database(
     cursor: sqlite3.Cursor, habits: dict[int, Habit], repetition: Repetition