lean into examples

examples/constants/constants.go

@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+// Use `const` to declare a constant value.
+// Constants can be ...
+const x string = "Hello World"
+
+func main() {
+    fmt.Println(x)
+}
+
+// todo: research

examples/constants/constants.sh

@@ -0,0 +1,2 @@
+$ go run constant.go 
+Hello World