xso-proc: fix warnings when struct names end on _

xso/ChangeLog

@@ -1,3 +1,19 @@
+Version NEXT:
+0000-00-00 Jonas Schäfer <jonas@zombofant.net>
+    * Breaking
+      - We now strip trailing underscores from identifiers before constructing
+        any type names we declare from derive macros. That means that it is
+        not possible to derive the traits on `Foo` and `Foo_` if both live
+        in the same scope.
+
+        As a workaround, you can put either of these types into a `mod` and
+        reexport them from the outer module. The types generated by the derive
+        macro will then be scoped inside the `mod` and cannot conflict with
+        the derived types on the other type.
+
+        All this is to avoid triggering the camel case lint on the types we
+        generate.
+
 Version 0.1.2:
 2024-07-26 Jonas Schäfer <jonas@zombofant.net>
     * Added