Add eslintignore items

Author: timneutkens

.eslintignore

@@ -10,4 +10,6 @@ packages/react-dev-overlay/lib/**
 **/__tmp__/**
 .github/actions/next-stats-action/.work
 packages/next-codemod/transforms/__testfixtures__/**/*
-packages/next-codemod/transforms/__tests__/**/*
+packages/next-codemod/transforms/__tests__/**/*
+packages/next-codemod/**/*.js
+packages/next-codemod/**/*.d.ts