add .editorconfig

.editorconfig

@@ -0,0 +1,35 @@
+root = true
+
+# Global
+[*]
+indent_style = unset
+indent_size = 4
+tab_width = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+# Unreal Engine 3 / Source
+[*.{uc,uci}]
+indent_style = tab
+
+[*.upkg]
+
+# Unreal Engine 3 / i18n
+[*.{chn,cht,cze,dan,deu,dut,esl,esn,fra,frc,hun,int,ita,jpn,kor,pol,por,ptb,rus,tur,ukr}]
+charset = utf-16le
+
+# Other
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{txt,cfg}]
+insert_final_newline = unset
+
+[*.yml]
+indent_style = space
+indent_size = 2
+
+[.gitignore]
+insert_final_newline = unset