chore: add github issue task template (#4340)

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,4 @@
-blank_issues_enabled: true
+blank_issues_enabled: false
 contact_links:
   - name: Questions
     url: https://github.com/formbricks/formbricks/discussions

.github/ISSUE_TEMPLATE/task.yml

@@ -0,0 +1,11 @@
+name: Task (internal)
+description: "Template for creating a task. Used by the Formbricks Team only \U0001f4e5"
+type: task
+body:
+  - type: textarea
+    id: task-summary
+    attributes:
+      label: Task description
+      description: A clear detailed-rich description of the task.
+    validations:
+      required: true