Добавление проверки EditorConfig в CI

Closes GH-10

.editorconfig

@@ -11,5 +11,5 @@ indent_size = 2
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[*.xml]
+[*.{xml,ent}]
 indent_size = 1

.github/workflows/editorconfig.yml

@@ -0,0 +1,22 @@
+name: Check EditorConfig
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Get changed files
+        id: get_file_changes
+        uses: trilom/file-changes-action@v1.2.3
+        with:
+          output: ' '
+      - name: Run editorconfig-checker
+        run: npx editorconfig-checker ${{ steps.get_file_changes.outputs.files }}