[EC-183] Move eslint and prettier to project root (#2536)

.editorconfig

@@ -0,0 +1,15 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Set default charset
+[*.{js,ts,scss,html}]
+charset = utf-8
+indent_style = space
+indent_size = 2