lean into examples

examples/panic/panic.go

@@ -0,0 +1,11 @@
+// A `panic` means something went unexpectedly wrong.
+// Mostly we use it to fail fast on errors that
+// shouldn't occur during normal operation.
+package main
+
+func main() {
+    // We'll use panic throught this book to check for
+    // unexpected errors. This is the only program in the
+    // book designed to panic.
+    panic("O noes")
+}

examples/panic/panic.sh

@@ -0,0 +1,7 @@
+$ go run 26-panic.go
+panic: O noes
+
+goroutine 1 [running]:
+main.main()
+	/.../src/26-panic.go:4 +0x47
+...