move all vlib modules to vlib/

examples/json.v

@@ -1,38 +0,0 @@
-import json
-
-struct User {
-	name          string
-	age           int
-mut:
-	is_registered bool
-}
-
-fn main() {
-	s := '[{ "name":"Frodo", "age":25}, {"name":"Bobby", "age":10}]'
-	users := json.decode( []User, s) or {
-		eprintln('Failed to parse json')
-		return
-	}
-	for user in users {
-		println('$user.name: $user.age')
-	}
-	println('')
-	for i, user in users {
-		println('$i) $user.name')
-		if !user.can_register() {
-			println('Cannot register $user.name, they are too young')
-		}
-	}
-	// Let's encode users again just for fun
-	println('')
-	println(json.encode(users))
-}
-
-fn (u User) can_register() bool {
-	return u.age >= 16
-}
-
-fn (u mut User) register() {
-	u.is_registered = true
-}
-