packaging-changes.md: Add initial LSP integration

Author: davidjharder

docs/packaging/packaging-changes.md

@@ -13,6 +13,13 @@ This page is meant to serve as a changelog of sorts for the Solus packaging envi
 
 ## 2025
 
+### November
+
+#### Initial lanuage server integration for `package.yml` files
+
+- All `package.yml` files now specify a YAML schema on the first line.
+- Install `yaml-language-server`, and use an editor with language server support to see hints on valid `package.yml` field values.
+
 ### September
 
 #### Added `autoupdate` as a `go-task` taskfile commands