Add issue templates

These templates auto-apply kind labels, and add a comment talking about where to route issues (controller-tools, controller-runtime, or here)

Author: DirectXMan12

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,18 @@
+---
+name: Bug report
+about: Problems and issues
+title: ''
+labels: kind/bug
+assignees: ''
+
+---
+
+<!-- STOP
+
+* If this is an issue with some sort of runtime mechanics, it probably belongs in https://sigs.k8s.io/controller-runtime instead
+* If this is an issue with CRD generation or webhook config generation, it probably belongs in sigs.k8s.io/controller-tools instead
+* If this is an issue with scaffolding, or is definitely a cross repository effort, it probably belongs here.
+
+-->
+
+/kind bug

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,18 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: kind/feature
+assignees: ''
+
+---
+
+<!-- STOP
+
+* If this is an issue with some sort of runtime mechanics, it probably belongs in https://sigs.k8s.io/controller-runtime instead
+* If this is an issue with CRD generation or webhook config generation, it probably belongs in sigs.k8s.io/controller-tools instead
+* If this is an issue with scaffolding, or is definitely a cross repository effort, it probably belongs here.
+
+-->
+
+/kind feature