chore: add templates

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

Author: jkroepke

.editorconfig

@@ -8,3 +8,6 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 end_of_line = lf
 max_line_length = 160
+
+[*.{yaml,yml}]
+indent_size = 2

.github/labeler.yml

@@ -0,0 +1,10 @@
+version: 1
+labels:
+  - label: "chore"
+    title: "^chore:.*"
+  - label: "🐞 bug"
+    title: "^fix:.*"
+  - label: "✨ enhancement"
+    title: "^feat:.*"
+  - label: "📖 docs"
+    title: "^docs:.*"

.github/workflows/pr-check.yaml

@@ -0,0 +1,55 @@
+name: Pull Request
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - labeled
+      - unlabeled
+
+jobs:
+  add-labels:
+    runs-on: ubuntu-latest
+    if: >-
+      !contains(github.event.pull_request.labels.*.name, '💥 breaking-change') &&
+      !contains(github.event.pull_request.labels.*.name, '✨ enhancement') &&
+      !contains(github.event.pull_request.labels.*.name, '🐞 bug') &&
+      !contains(github.event.pull_request.labels.*.name, '📖 docs') &&
+      !contains(github.event.pull_request.labels.*.name, 'chore') &&
+      !contains(github.event.pull_request.labels.*.name, '🛠️ dependencies')
+    steps:
+      - uses: srvaroa/labeler@master
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+  validate-labels:
+    name: check labels missing
+    runs-on: ubuntu-latest
+    steps:
+      - name: check
+        if: >-
+          !contains(github.event.pull_request.labels.*.name, '💥 breaking-change') &&
+          !contains(github.event.pull_request.labels.*.name, '✨ enhancement') &&
+          !contains(github.event.pull_request.labels.*.name, '🐞 bug') &&
+          !contains(github.event.pull_request.labels.*.name, '📖 docs') &&
+          !contains(github.event.pull_request.labels.*.name, 'chore') &&
+          !contains(github.event.pull_request.labels.*.name, '🛠️ dependencies')
+        run: >-
+          echo One of the following labels is missing on this PR:
+          breaking-change enhancement bug docs chore && exit 1
+  validate-title:
+    name: check title prefix
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: check
+        run: |
+          PR_TITLE_PREFIX=$(echo "$PR_TITLE" | cut -d':' -f1)
+          if [[ "$PR_TITLE_PREFIX" == "fix"* ]] || [[ "$PR_TITLE_PREFIX" == "feat"* ]] || [[ "$PR_TITLE_PREFIX" == "chore"* ]]; then
+            exit 0
+          fi
+
+          echo "PR title must start with feat, fix or chore"
+          exit 1
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}