Standardise files with files in sous-chefs/repo-management

Signed-off-by: Xorima Bot <xorimabot@avon-lea.co.uk>

.editorconfig

@@ -1,11 +1,19 @@
-#https://EditorConfig.org
+# 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
+
+# 2 space indentation
 indent_style = space
 indent_size = 2
+
+# Avoid issues parsing cookbook files later
 charset = utf-8
+
+# Avoid cookstyle warnings
 trim_trailing_whitespace = true