Fix buffer writebits and readbits

CHANGELOG.md

@@ -3,6 +3,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased](https://github.com/Kampfkarren/selene/compare/0.29.0...HEAD)
 
+- Added `buffer.readbits` and `buffer.writebits` to the Luau standard library
+
 ## [0.29.0](https://github.com/Kampfkarren/selene/releases/tag/0.29.0) - 2025-07-23
 - Added `Instance.fromExisting` to the Roblox standard library
 - Added new [`roblox_manual_fromscale_or_fromoffset` lint](https://kampfkarren.github.io/selene/lints/roblox_manual_fromscale_or_fromoffset.html), which will warn when the arguments could be simplified to `UDim2.fromScale` or `UDim2.fromOffset`.

selene-lib/default_std/luau.yml

@@ -110,6 +110,12 @@ globals:
       - type:
           display: buffer
     must_use: true
+  buffer.readbits:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
   buffer.readf32:
     args:
       - type:
@@ -170,6 +176,12 @@ globals:
       - type:
           display: buffer
     must_use: true
+  buffer.writebits:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
   buffer.writef32:
     args:
       - type: