Fine tune issue templates (#8)

* Use type key for "Issue Type"
* Remove PR template (yaml)

Author: tomschr

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -2,6 +2,7 @@ name: Bug Report
 description: Report a reproducible bug or unexpected behavior.
 labels: [bug]
 assignees: [tomschr]
+type: bug
 
 body:
   - type: markdown
@@ -92,4 +93,4 @@ body:
         - Environment variables:
         - Installed packages:
     validations:
-      required: false
+      required: false

.github/ISSUE_TEMPLATE/docs-update.yml

@@ -1,6 +1,9 @@
 name: Documentation Update
 description: Propose improvements or corrections to the documentation.
 labels: [documentation]
+type: task
+
+
 body:
   - type: markdown
     attributes:

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -2,6 +2,7 @@ name: Feature Request
 description: Suggest an idea or request a new feature.
 labels: [enhancement]
 assignees: [tomschr]
+type: task
 
 body:
   - type: markdown