Add issue template (#251)

This makes sure that bugs will be reported as issues while feature
requests and other questions will be created as discussions.

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -0,0 +1,32 @@
+name: Bug Report
+description: Report a bug in NetBird Operator.
+type: bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for taking the time to fill ot this bug report! Please check previous issues and discussions before submitting a new issue.
+  - type: input
+    attributes:
+      label: NetBird Operator Version
+      placeholder: eg. v0.4.0
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Kubernetes Version
+      placeholder: eg. v1.36.0
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: CNI
+      placeholder: eg. Calico, Cilium, Azure CNI...
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Describe the bug
+      description: A clear description of what the bug is.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yaml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Feature Requests
+    about: Propose and discuss new features.
+    url: https://github.com/netbirdio/kubernetes-operator/discussions/new?category=feature-requests