init: Add editorconfig

Author: Intellicode

.editorconfig

@@ -0,0 +1,40 @@
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[vcbuild.bat]
+end_of_line = crlf
+
+[{lib,src,test}/**.js]
+indent_style = space
+indent_size = 2
+
+[src/**.{h,cc}]
+indent_style = space
+indent_size = 2
+
+[test/*.py]
+indent_style = space
+indent_size = 2
+
+[configure]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+indent_size = 8
+
+[{deps,tools}/**]
+indent_style = ignore
+indent_size = ignore
+end_of_line = ignore
+trim_trailing_whitespace = ignore
+charset = ignore
+
+[{test/fixtures,deps,tools/eslint,tools/gyp,tools/icu,tools/msvs}/**]
+insert_final_newline = false