add changeset

Author: iscai-msft

.chronus/changes/tcgc-reservedWordsRule-2026-2-24-16-19-14.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+Add linter rules for reserved words in languages