chore: move frontend files

frontend/.editorconfig

@@ -0,0 +1,29 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = false
+insert_final_newline = false
+
+[*.vue]
+indent_style = tab
+
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.{scss,css}]
+indent_style = space
+indent_size = 2
+
+[.nvmrc]
+insert_final_newline = false