fix(options): mark winhighlight as list style (#19477)

Also add missing fcs, lcs and winhighlight to list of key-value options for `vim.opt`.

Co-authored-by: ii14 <ii14@users.noreply.github.com>

runtime/lua/vim/_meta.lua

@@ -198,7 +198,10 @@ end
 --                  Can be done in a separate PR.
 local key_value_options = {
   fillchars = true,
+  fcs = true,
   listchars = true,
+  lcs = true,
+  winhighlight = true,
   winhl = true,
 }