Add gitattributes file

.gitattributes

@@ -0,0 +1,22 @@
+#
+# Exclude these files from release archives.
+# This will also make them unavailable when using Composer with `--prefer-dist`.
+# https://blog.madewithlove.be/post/gitattributes/
+#
+/.gitattributes       export-ignore
+/.gitignore           export-ignore
+/phpcs.xml            export-ignore
+/phpstan.neon         export-ignore
+/phpstanbootstrap.php export-ignore
+/phpunit.xml          export-ignore
+/.github              export-ignore
+/scripts              export-ignore
+/tests                export-ignore
+
+#
+# Auto detect text files and perform LF normalization
+# https://pablorsk.medium.com/be-a-git-ninja-the-gitattributes-file-e58c07c9e915
+#
+* text=auto
+
+*.php text