[Wiki] Sidebar and contribution flow update (#1573)

* sidebar and contribution update

* title categories

Author: eriqua

docs/wiki/Contribution guide - Contribution flow.md

@@ -65,6 +65,14 @@ Once the contribution is implemented and the changes are pushed to your forked r
 
 Finally, once your contribution is implemented and validated, open a PR for the CARML maintainers to review. Make sure you:
 
+- Make sure you provide a meaningful PR title in the following format: `[<Category>] <PR title>`. For `[<Category>]` use one of the following, depending on which one is the primary improvement your PR intends to make:
+  - `[Modules]`: For improvements to the CARML library.
+  - `[CI environment]`: For improvements to the CI environment pipelines.
+  - `[Static Validation]`: For improvements to global Pester tests.
+  - `[Wiki]`: For improvements to the documentation.
+  - `[Utilities]`: For improvements to the tools in the utilities.
+  - `[Fixes]`: For bug fixes when not specifically related to any of the above categories.
+- Make sure you provide a meaningful PR description.
 - Follow instructions you find in the PR template.
 - Set your Github handle as assignee.
 - Reference the issue number as per the [Create or pick up an issue](#create-or-pick-up-an-issue) step.

docs/wiki/_Sidebar.md

@@ -5,6 +5,7 @@
   - [CARML overview](./The%20context%20-%20CARML%20overview)
     - [The library](./The%20context%20-%20CARML%20library)
     - [The CI environment](./The%20context%20-%20CARML%20CI%20environment)
+  - [Logical layers and personas](./The%20context%20-%20Logical%20layers%20and%20personas)
 - [Getting started](./Getting%20started)
   - [**Scenario 1:** Consume module library only](./Getting%20started%20-%20Scenario%201%20Consume%20library)
   - [**Scenario 2:** Onboard module library and CI environment](./Getting%20started%20-%20Scenario%202%20Onboard%20module%20library%20and%20CI%20environment)