Add editorconfig

Signed-off-by: yubiuser <github@yubiuser.dev>

.github/workflows/editorconfig.yml

@@ -0,0 +1,18 @@
+name: Editorconfig-Checker
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  editorconfig-checker:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Get editorconfig-checker
+      uses: editorconfig-checker/action-editorconfig-checker@main # tag v1.0.0 is really out of date
+
+    - name: Run editorconfig-checker
+      run: editorconfig-checker