Add Markdown lint configuration style file

.mdl_style.rb

@@ -0,0 +1,17 @@
+# Markdownlint Rules
+#
+# The Markdownlint style is defined according to the following rules:
+# https://github.com/markdownlint/markdownlint/blob/main/docs/creating_styles.md
+#
+# The rules are defined in the following page:
+# https://github.com/markdownlint/markdownlint/blob/main/docs/RULES.md
+
+all
+
+# Excluded rules
+exclude_rule "MD013" # Line length
+exclude_rule "MD024" # Multiple headers with the same content
+
+# Rule parameters
+rule "MD007", :indent => 2 # Unordered list indentation
+rule "MD026", :punctuation => ".,;:!" # Trailing punctuation in header