add ci that is supposed to fail

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout last commit
+        uses: actions/checkout@v3
+      - name: Check format
+        run: python check.py

check.py

@@ -0,0 +1,17 @@
+import re
+
+errors: list[tuple[str, int, str]] = []
+
+for name in ('emoji_category.txt', 'emoji_word.txt'):
+    with open(f'opencc/{name}') as file:
+        lines = file.readlines()
+    for i, line in enumerate(lines):
+        match = re.match(r'(\S+)\t(\S+)( \S+)+', line)
+        if not match or match.group(1) != match.group(2):
+            errors.append((name, i + 1, line[:-1] if line.endswith('\n') else line))
+
+if errors:
+    print('Format error')
+    for error in errors:
+        print(f'{error[0]}:{error[1]} {error[2]}')
+    exit(1)