Configure markdownlint (mld) via .mdlrc and style file

Set lists indentation to 4 instead of default 2.

.mdl.rb

@@ -0,0 +1,3 @@
+all
+exclude_tag :line_length
+rule 'MD007', :indent => 4

.mdlrc

@@ -1 +1 @@
-tags "~line_length"
+style ".mdl.rb"

docs/manual/developer/04_style_guide.md

@@ -3,22 +3,22 @@
 ## Labels
 
 * Use labels efficiently
-  * For example, use only the minimal necessary labels
+    * For example, use only the minimal necessary labels
 * Labels must have a clear and objective description
 * New labels should be created in lowercase
 * New labels should be agnostic to PRs and Issues
 * Labels related to the same group/category should share the same colors, like in these examples:
-  * Assessment languages related labels, like "OVAL" and "OCIL", share the color <span style="color:#0e8a16">#0e8a16</span>
-  * Attention required labels, like "BLOCKER" and "productization-issue", share the color <span style="color:#e11d21">#e11d21</span>
-  * Benchmarks related labels, like "CIS" and "STIG", share the color <span style="color:#08d2d8">#08d2d8</span>
-  * Components related labels, like "Test Suite" and "Documentation", share the color <span style="color:#84b6eb">#84b6eb</span>
-  * Improvements related labels, like "New Product" or "New Rule", share the color <span style="color:#c2e0c6">#c2e0c6</span>
-  * "EyeCatcher" related labels, like a "Highlight" or "bugfix", share the color <span style="color:#fbca04">#fbca04</span>
-  * Product related labels, like "RHEL" and "Ubuntu", share the color <span style="color:#4141f4">#4141f4</span>
-  * Remediation related labels, like "Ansible" and "Bash", share the color <span style="color:#9bf442">#9bf442</span>
+    * Assessment languages related labels, like "OVAL" and "OCIL", share the color <span style="color:#0e8a16">#0e8a16</span>
+    * Attention required labels, like "BLOCKER" and "productization-issue", share the color <span style="color:#e11d21">#e11d21</span>
+    * Benchmarks related labels, like "CIS" and "STIG", share the color <span style="color:#08d2d8">#08d2d8</span>
+    * Components related labels, like "Test Suite" and "Documentation", share the color <span style="color:#84b6eb">#84b6eb</span>
+    * Improvements related labels, like "New Product" or "New Rule", share the color <span style="color:#c2e0c6">#c2e0c6</span>
+    * "EyeCatcher" related labels, like a "Highlight" or "bugfix", share the color <span style="color:#fbca04">#fbca04</span>
+    * Product related labels, like "RHEL" and "Ubuntu", share the color <span style="color:#4141f4">#4141f4</span>
+    * Remediation related labels, like "Ansible" and "Bash", share the color <span style="color:#9bf442">#9bf442</span>
 * It is possible to have custom labels for ad-hoc tasks. These must be properly managed and removed when no longer necessary.
 * Be careful changing labels names or removing labels. Some labels are used by bots and automated processes, like the release changelog generation:
-  * https://github.com/ComplianceAsCode/content/blob/master/.github/workflows/release-changelog.json
+    * https://github.com/ComplianceAsCode/content/blob/master/.github/workflows/release-changelog.json
 
 ## Pull Requests
 
@@ -88,9 +88,9 @@ and keep these guidelines in mind when writing new code.
 * Shall use 4-space indentation
 * Shall have a docstring comment describe what the macro does
 * Shall have a docstring comment describing all parameters and their types
-  * Types shall be Python class names. (E.g. `str`, `bool`, `dict`, etc)
-  * Shall be last section of the docstring
-  * Shall have one blank after list before the close of the docstring block
+    * Types shall be Python class names. (E.g. `str`, `bool`, `dict`, etc)
+    * Shall be last section of the docstring
+    * Shall have one blank after list before the close of the docstring block
 * Shall have two blank lines between macros
 
 ### Python
@@ -265,16 +265,16 @@ Control sections must be in the following order, all sections are required unles
 * `documentation_complete`
 * `id`
 * `metadata`
-  * `reference`
-  * `version`
-  * `SMEs`
+    * `reference`
+    * `version`
+    * `SMEs`
 * `title`
-  * Shall be short and descriptive 
+    * Shall be short and descriptive 
 * `description` (HTML-Like)
 * `extends` (Optional)
-  * Must be valid id of another profile id
+    * Must be valid id of another profile id
 * `selections`
-  * Must be valid rule ids
+    * Must be valid rule ids
 
 ## Remediation