chore: add converter request template

.github/ISSUE_TEMPLATE/converter_request.md

@@ -0,0 +1,22 @@
+---
+name: Converter request
+about: Suggest an converter for this project
+title: "[Converter Request]"
+labels: "converter request"
+assignees: ''
+
+---
+
+**What file formats is missing?**
+<!-- Provide an example of what you would like to convert -->
+
+**What converter should be added**
+<!-- It has to be free and preferably open source -->
+
+**Are you willing to add it?**
+<!-- Adding a converter is very easy just copy one of the existing and modify it -->
+[ ] Yes
+[ ] No
+
+**Additional context**
+<!-- Add any other context or screenshots about the feature request here. -->