Create concept article template with guidelines

Added a template for concept articles with SEO guidance.

Author: YaelSchuster

.github/agents/templates/concept.md

@@ -0,0 +1,102 @@
+---
+title: [Follow SEO guidance at 
+https://review.learn.microsoft.com/en-us/help/platform/seo-meta-title]
+description: "[Article description]."
+author: [your GitHub alias]
+ms.author: [your Microsoft alias or a team alias]
+ms.service: [the approved service name]
+ms.topic: concept-article #Don't change.
+ms.date: [mm/dd/yyyy]
+
+#customer intent: As a <role>, I want <what> so that <why>.
+
+---
+
+<!-- --------------------------------------
+
+- Use this template with pattern instructions for:
+
+Concept
+
+- Before you sign off or merge:
+
+Remove all comments except the customer intent.
+
+- Feedback:
+
+https://aka.ms/patterns-feedback
+
+-->
+
+# [noun phrase] concept(s)
+
+or
+
+# [noun] overview
+
+<!-- Required: Article headline - H1
+
+Identify the product, service, or feature the
+article covers.
+
+-->
+
+[Introduce and explain the purpose of the article.]
+
+<!-- Required: Introductory paragraphs (no heading)
+
+Write a brief introduction that can help the user
+determine whether the article is relevant for them
+and to describe the concept the article covers.
+
+For definitive concepts, it's better to lead with a
+sentence in the form, "X is a (type of) Y that does Z."
+
+-->
+
+## Prerequisites
+
+<!--Optional: Prerequisites - H2
+
+If this section is needed, make "Prerequisites" your
+first H2 in the article.
+
+Use clear and unambiguous language and use
+an unordered list format. 
+
+-->
+
+## [Main idea]
+
+[Describe a main idea.]
+
+<!-- Required: Main ideas - H2
+
+Use one or more H2 sections to describe the main ideas
+of the concept.
+
+Follow each H2 heading with a sentence about how
+the section contributes to the whole. Then, describe 
+the concept's critical features as you define what it is.
+
+-->
+
+## Related content
+
+- [Related article title](link.md)
+- [Related article title](link.md)
+- [Related article title](link.md)
+
+<!-- Optional: Related content - H2
+
+Consider including a "Related content" H2 section that 
+lists links to 1 to 3 articles the user might find helpful.
+
+-->
+
+<!--
+
+Remove all comments except the customer intent
+before you sign off or merge to the main branch.
+
+-->