Add template to request images

.github/ISSUE_TEMPLATE/image-request.md

@@ -0,0 +1,32 @@
+---
+name: Image/Diagram/Flowchart/UML Request
+about: Request images diagrams, flowcharts, or UMLs for the IOTA Wiki.
+title: "[Diagram/Flowchart/UML Request]"
+labels: 'diagram-request, flowchart-request, uml-request'
+assignees: ''
+
+---
+
+## Description
+
+***Provide a detailed description of the image, diagram, flowchart, or UML you're requesting. Include information like the specific elements to be included, the overall layout, and any text or labels that should be part of the image.***
+
+## Context and Usage
+
+***Explain why this image is important. Provide context or links to where the image will be used within the Wiki.***
+
+## URL of Page
+
+***Specify the URL of the Wiki page where this image will be used.***
+
+## Technical Requirements
+
+***Specify any technical requirements or preferences.***
+
+## Additional Information
+
+***Add any other details, sketches, or references for the requested image here.***
+
+## Contact Person
+
+***Who should be contacted for further information or clarification regarding this request?***