feat: Add Dependabot auto-merge workflow (#287)

This PR adds a GitHub workflow to automatically manage Dependabot pull
requests.

This workflow uses the `ad/dependabot-auto-approve@v1` GitHub Action,
which may need to be explicitly whitelisted in the organization's
settings.

Author: Marenz

.github/workflows/auto-dependabot.yaml

@@ -0,0 +1,19 @@
+name: Dependabot Auto Manage
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - uses: ad/dependabot-auto-approve@d60f853230db2bb07168b39c180c5dd034b63f28
+        with:
+          dependency-type: 'all'
+          auto-merge: 'true'
+          add-label: 'auto-merged'
+          merge-method: 'merge'
+          ignore-regex-pr-title: '.*grpc.*,.*protobuf.*'

mkdocs.yml

@@ -102,6 +102,8 @@ plugins:
           options:
             paths: ["py"]
             docstring_section_style: spacy
+            docstring_options:
+              warn_missing_types: false
             inherited_members: true
             merge_init_into_class: false
             separate_signature: true

proto/frequenz/api/dispatch/v1/dispatch.proto

@@ -12,7 +12,6 @@ syntax = "proto3";
 
 package frequenz.api.dispatch.v1;
 
-import "google/protobuf/empty.proto";
 import "google/protobuf/field_mask.proto";
 import "google/protobuf/struct.proto";
 import "google/protobuf/timestamp.proto";