chore: add GitHub issue templates and funding config

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Report a bug in tiny-packupdate.nvim
+title: ""
+labels: bug
+assignees: ""
+---
+
+**Neovim version** (`nvim --version`):
+
+**tiny-packupdate.nvim version/commit**:
+
+**Setup**:
+
+```lua
+require("tiny-packupdate").setup({
+  -- your config here
+})
+```
+
+**Describe the bug**:
+
+**Steps to reproduce**:
+
+1.
+2.
+3.
+
+**Expected behavior**:
+
+**Actual behavior**:
+
+**Screenshots** (if applicable):