feat: add autocommand event when search wraps around (#8487)

src/nvim/auevents.lua

@@ -76,6 +76,7 @@ return {
     'QuickFixCmdPre',         -- before :make, :grep etc.
     'QuitPre',                -- before :quit
     'RemoteReply',            -- upon string reception from a remote vim
+    'SearchWrapped',          -- after the search wrapped around
     'SessionLoadPost',        -- after loading a session file
     'ShellCmdPost',           -- after ":!cmd"
     'ShellFilterPost',        -- after ":1,2!cmd", ":w !cmd", ":r !cmd".

src/nvim/search.c

@@ -1354,6 +1354,10 @@ int do_search(oparg_T *oap, int dirc, int search_delim, char_u *pat, long count,
     }
     retval = 1;                     // pattern found
 
+    if (sia && sia->sa_wrapped) {
+      apply_autocmds(EVENT_SEARCHWRAPPED, NULL, NULL, false, NULL);
+    }
+
     /*
      * Add character and/or line offset
      */