Start of the internal cmd

gen website examples is the first command that I should finish soon because we need it for the website's "Recipe" page. Two more html query-relative dependencies added.


Former-commit-id: 04b7f8bb968cbc3c441e2a09a4aa525b10cd4aca

internal/cmd/gen/website/examples/example.go

@@ -0,0 +1,13 @@
+package examples
+
+// Category defines the category of which will contain examples.
+type Category struct {
+	Name     string // i.e "Beginner", "Intermediate", "Advanced", first upper.
+	Examples []Example
+}
+
+// Example defines the example link.
+type Example struct {
+	Name       string // i.e: Hello World
+	DataSource string // i.e: https://raw.githubusercontent.com/kataras/iris/master/_examples/beginner/hello-world.go
+}