Merge pull request #45 from DSD-DBS/editorconfig

lint: add .editorconfig for universal linting

.editorconfig

@@ -0,0 +1,22 @@
+# Copyright DB Netz AG and contributors
+# SPDX-License-Identifier: Apache-2.0
+
+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf # lf = \n, crlf = \r\n
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# no whitespace trimming in Markdown
+[*.md]
+max_line_length = 0
+trim_trailing_whitespace = false
+
+# windows shell scripts shall get the Carriage-Return-Line-Feed (\r\n) line ending
+[{*.bat,*.cmd}]
+end_of_line = crlf