chore: Enfore consistent file-name casing on all backend packages (#15755)

packages/@n8n/db/.eslintrc.js

@@ -4,4 +4,15 @@ const sharedOptions = require('@n8n/eslint-config/shared');
 module.exports = {
 	extends: ['@n8n/eslint-config/base'],
 	...sharedOptions(__dirname),
+	rules: {
+		'unicorn/filename-case': ['error', { case: 'kebabCase' }],
+	},
+	overrides: [
+		{
+			files: ['./src/migrations/**/*.ts'],
+			rules: {
+				'unicorn/filename-case': 'off',
+			},
+		},
+	],
 };