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

.gitattributes

@@ -0,0 +1,16 @@
+# See this article for reference: https://help.github.com/articles/dealing-with-line-endings/
+# Refreshing repo after line ending change:
+# https://help.github.com/articles/dealing-with-line-endings/#refreshing-a-repository-after-changing-line-endings
+
+# Handle line endings automatically for files detected as text
+# and leave all files detected as binary untouched.
+* text=auto
+
+#
+# The above will handle all files NOT found below
+#
+# These files are text and should be normalized (Convert crlf => lf)
+# Use lf as eol for these files
+*.js    text eol=lf
+*.ts    text eol=lf
+*.json  text eol=lf