style: 🎨 fix crlf -> lf for real this time, using .gitattributes

Add a .gitattributes file to permanentyl fix crlf issues.

For explanantion:
https://adaptivepatchwork.com/2012/03/01/mind-the-end-of-your-line/#the-new-system

.gitignore

@@ -1,31 +1,31 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
-
-# dependencies
-/node_modules
-/.pnp
-.pnp.js
-
-# testing
-/coverage
-
-# production
-/build
-/data
-
-# misc
-.DS_Store
-.env
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-/lib/**/*.old
-/lib/**/*.bak
-
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Editor
-*.swp
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+/data
+
+# misc
+.DS_Store
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+/lib/**/*.old
+/lib/**/*.bak
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Editor
+*.swp
 *.swo