ci: Update issue templates

Author: DeRuina

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,38 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear, concise summary of the problem.
+
+---
+
+## Environment
+- **timberjack version:** v1.x.y
+- **Go version:** go1.22.x (output of `go version`)
+- **OS/Arch:** e.g., linux/amd64
+- **Runtime:** container? k8s? bare metal?
+- **Filesystem (if relevant):** e.g., ext4, NFS, tmpfs
+- **Command used to repro:** e.g., `go test -count=1 ./...`
+
+---
+
+## Steps to reproduce
+1. …
+2. …
+3. …
+
+### Minimal code (required)
+> Provide the smallest program or test that reproduces the issue.
+
+```go
+package main
+
+func main() {
+    // minimal example here
+}