patch 8.2.0149: maintaining a Vim9 branch separately is more work

Problem:    Maintaining a Vim9 branch separately is more work.
Solution:   Merge the Vim9 script changes.
diff --git a/src/proto/list.pro b/src/proto/list.pro
index ae8a732..d60463d 100644
--- a/src/proto/list.pro
+++ b/src/proto/list.pro
@@ -3,6 +3,8 @@
 void list_rem_watch(list_T *l, listwatch_T *lwrem);
 list_T *list_alloc(void);
 list_T *list_alloc_id(alloc_id_T id);
+list_T *list_alloc_with_items(int count);
+void list_set_item(list_T *l, int idx, typval_T *tv);
 int rettv_list_alloc(typval_T *rettv);
 int rettv_list_alloc_id(typval_T *rettv, alloc_id_T id);
 void rettv_list_set(typval_T *rettv, list_T *l);
@@ -11,7 +13,8 @@
 void list_free_items(int copyID);
 void list_free(list_T *l);
 listitem_T *listitem_alloc(void);
-void listitem_free(listitem_T *item);
+void list_free_item(list_T *l, listitem_T *item);
+void listitem_free(list_T *l, listitem_T *item);
 void listitem_remove(list_T *l, listitem_T *item);
 long list_len(list_T *l);
 int list_equal(list_T *l1, list_T *l2, int ic, int recursive);
@@ -21,6 +24,7 @@
 long list_idx_of_item(list_T *l, listitem_T *item);
 void list_append(list_T *l, listitem_T *item);
 int list_append_tv(list_T *l, typval_T *tv);
+int list_append_tv_move(list_T *l, typval_T *tv);
 int list_append_dict(list_T *list, dict_T *dict);
 int list_append_list(list_T *list1, list_T *list2);
 int list_append_string(list_T *l, char_u *str, int len);
@@ -34,7 +38,7 @@
 char_u *list2string(typval_T *tv, int copyID, int restore_copyID);
 int list_join(garray_T *gap, list_T *l, char_u *sep, int echo_style, int restore_copyID, int copyID);
 void f_join(typval_T *argvars, typval_T *rettv);
-int get_list_tv(char_u **arg, typval_T *rettv, int evaluate);
+int get_list_tv(char_u **arg, typval_T *rettv, int evaluate, int do_error);
 int write_list(FILE *fd, list_T *list, int binary);
 void init_static_list(staticList10_T *sl);
 void f_list2str(typval_T *argvars, typval_T *rettv);