Add discussion template for 'Help wanted'

.github/DISCUSSION_TEMPLATE/help-wanted.yml

@@ -0,0 +1,51 @@
+title: 'Help wanted'
+body:
+  - type: input
+    validations:
+      required: true
+    attributes:
+      label: Shlink version
+      placeholder: x.y.z
+  - type: input
+    validations:
+      required: true
+    attributes:
+      label: PHP version
+      placeholder: x.y.z
+  - type: dropdown
+    validations:
+      required: true
+    attributes:
+      label: How do you serve Shlink
+      options:
+        - Self-hosted Apache
+        - Self-hosted nginx
+        - Self-hosted openswoole
+        - Self-hosted RoadRunner
+        - Openswoole Docker image
+        - RoadRunner Docker image
+        - Other (explain in summary)
+  - type: dropdown
+    validations:
+      required: true
+    attributes:
+      label: Database engine
+      options:
+        - MySQL
+        - MariaDB
+        - PostgreSQL
+        - MicrosoftSQL
+        - SQLite
+  - type: input
+    validations:
+      required: true
+    attributes:
+      label: Database version
+      placeholder: x.y.z
+  - type: markdown
+    validations:
+      required: true
+    attributes:
+      label: Summary
+      value: '<!-- Describe your issue, question or request here. -->'
+