chore: Update .gitattributes and .gitignore; add .editorconfig

Author: roxblnfk

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.yaml]
+indent_size = 2
+
+[*.yml]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab

.gitattributes

@@ -1,4 +1,4 @@
-* text=auto
+* text=auto eol=lf
 
 /.*                     export-ignore
 /tests                  export-ignore

.gitignore

@@ -1,6 +1,7 @@
 /.*
 !/.github/
 !/.php-cs-fixer.dist.php
+!/.editorconfig
 /runtime/
 /vendor/
 /.env