chore: add GitHub issue templates and funding config

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,15 @@
+---
+name: Feature request
+about: Suggest an idea for tiny-packupdate.nvim
+title: ""
+labels: enhancement
+assignees: ""
+---
+
+**Is your feature request related to a problem?**
+
+**Describe the solution you'd like**:
+
+**Describe alternatives you've considered**:
+
+**Additional context**: