Add default list setting (#875)

Co-authored-by: Sytone <github@sytone.com>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/875
Reviewed-by: konrad <konrad@kola-entertainments.de>
Co-authored-by: sytone <kolaente@sytone.com>
Co-committed-by: sytone <kolaente@sytone.com>

.editorconfig

@@ -0,0 +1,22 @@
+# 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
+
+[*.go]
+indent_style = tab
+
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2
+
+[*.json]
+indent_style = space
+indent_size = 4