docs(issue_template): migrate from .md to .yml format (#6621)

Co-authored-by: Gildor <521036+Jildor@users.noreply.github.com>
Co-authored-by: Shauren <shauren.trinity@gmail.com>
Co-authored-by: Treeston <14020072+treeston@users.noreply.github.com>

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,43 @@
+name: Feature request
+description: Suggest an idea for this project
+title: "Feature: "
+labels: [Suggestion]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking your time to fill out a feature request. Remember to fill out all fields including the title above. 
+        An issue that is not properly filled out will be closed. 
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe your feature request or suggestion in detail
+      description: |
+        A clear and concise description of what you want to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe a possible solution to your feature or suggestion in detail
+      description: |
+        A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: false
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional context
+      description: |
+        Add any other context or screenshots about the feature request here.
+    validations:
+      required: false
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for your contribution.
+        If you use AzerothCore regularly, we really NEED your help to:
+        - Test our fixes: https://www.azerothcore.org/wiki/How-to-test-a-PR
+        - Report issues or suggestions: https://github.com/azerothcore/azerothcore-wotlk/issues/new/choose
+        - Improve the documentation/wiki: https://www.azerothcore.org/wiki/home
+        With your help, the project can evolve much quicker!