document eternal file

MANUAL.md

@@ -99,6 +99,7 @@ Uranium Template originally formed during the creation of a currently unreleased
   - [`util`](#util)
   - [`aft`](#aft)
   - [`noautplay`](#noautplay)
+  - [`eternalfile`](#eternalfile)
   - [`uwuify`](#uwuify)
 - [Examples](#examples)
   - [The obligatory](#the-obligatory)
@@ -744,6 +745,14 @@ A single function which can be called before `uranium.ready()` to disable autopl
 require('stdlib.noautoplay')()
 ```
 
+### `eternalfile`
+
+A single function which turns your file into an eternal, neverending file, until the player puts it out of its misery by exiting. The current beat will always go from 0 to 1 and start over once this is enabled.
+
+```lua
+require('stdlib.eternalfile')()
+```
+
 ### `uwuify`
 
 ```lua

template

@@ -1 +1 @@
-Subproject commit ed260e9d695777c012293a58d895f0ae09fb9265
+Subproject commit dcd55494a29a2986304c4ee0a79d3acf1f9fe470