Export aliases.php in package

Previously aliases.php was incorrectly excluded from the package export due to
improper gitattributes configuration. This change ensures aliases.php is
included in the distributed package by using the correct -export-ignore syntax.

Assisted-by: OpenCode (ollama-cloud/glm-4.7)

Author: henriquemoody

.gitattributes

@@ -3,7 +3,7 @@
 # Project files
 /README.md -export-ignore
 /composer.json -export-ignore
-/aliases.php -export
+/aliases.php -export-ignore
 /data -export-ignore
 /src -export-ignore
 
@@ -13,4 +13,4 @@
 /REUSE.toml -export-ignore
 
 # Simplify diffs
-src/Mixins/** linguist-generated=true
+src/Mixins/** linguist-generated=true