update reference

Author: Grabsky

reference.md

@@ -5,6 +5,32 @@ order: 95
 
 # Reference
 
+==- Core Components
+Libraries and utilities exposed to the script environment.
+
+{.list-icon}
+- **Core Libraries**
+  - :icon-package: [`string`](https://devdocs.io/lua/index#6.4)
+  - :icon-package: [`table`](https://devdocs.io/lua/index#6.6)
+  - :icon-package: [`math`](https://devdocs.io/lua/index#6.7)
+  - :icon-package: [`io`](https://devdocs.io/lua/index#6.8)
+  - :icon-package: [`os`](https://devdocs.io/lua/index#6.9)
+  - :icon-package: [`java`](https://gudzpoz.github.io/luajava/api.html)
+- **Core Functions**
+  - :icon-code: [`pcall`](https://devdocs.io/lua/index#pdf-pcall)
+  - :icon-code: [`assert`](https://devdocs.io/lua/index#pdf-assert)
+  - :icon-code: [`error`](https://devdocs.io/lua/index#pdf-error)
+  - :icon-code: [`type`](https://devdocs.io/lua/index#pdf-type)
+  - :icon-code: [`pairs`](https://devdocs.io/lua/index#pdf-pairs)
+  - :icon-code: [`ipairs`](https://devdocs.io/lua/index#pdf-ipairs)
+  - :icon-code: [`next`](https://devdocs.io/lua/index#pdf-next)
+  - :icon-code: [`select`](https://devdocs.io/lua/index#pdf-select)
+  - :icon-code: [`tonumber`](https://devdocs.io/lua/index#pdf-tonumber)
+  - :icon-code: [`tostring`](https://devdocs.io/lua/index#pdf-tostring)
+  - :icon-code: [`unpack`](https://devdocs.io/lua/index#pdf-unpack)
+  - :icon-code: [`require`](https://devdocs.io/lua/index#pdf-require)
+==-
+
 === Script
 Main script class available in the global scope of each script. Provides access to various utilities.
 ```lua Variables
@@ -28,6 +54,7 @@ script:registerCommand(handler: (sender: CommandSender, args: table) -> void, me
 --  @param handler The event handler function
 script:registerListener(event: string, handler: (event: Event) -> void): void
 ```
+===
 
 === Scheduler
 Provides methods to schedule and manage tasks. It supports both synchronous and asynchronous task execution with various timing options.
@@ -69,3 +96,4 @@ scheduler:runRepeatingAsync(handler: (BukkitRunnable) -> void, delay: number, pe
 --  @param task The task to cancel
 scheduler:cancel(taskId: number | runnable: BukkitRunnable | task: BukkitTask): void
 ```
+===