refactor(init): call imports and exports via lib

Deprecate import (now just references lib); when calling or indexing
lib for the first time, attempt to load a module else call an export.

fxmanifest.lua

@@ -23,7 +23,7 @@ game         'gta5'
 --[[ Resource Information ]]--
 name         'ox_lib'
 author       'Linden'
-version      '1.4.0'
+version      '1.5.0'
 repository   'https://github.com/overextended/ox_lib'
 description  'A library of shared functions to utilise in other resources.'
 
@@ -41,6 +41,11 @@ files {
 
 shared_script 'resource/main.lua'
 
+shared_scripts {
+    'resource/**/shared.lua',
+    'resource/**/shared/*.lua'
+}
+
 client_scripts {
     'resource/**/client.lua',
     'resource/**/client/*.lua'