feat: universal selector (#1877)

lua/avante/ui/selector/providers/native.lua

@@ -0,0 +1,21 @@
+local M = {}
+
+---@param selector avante.ui.Selector
+function M.show(selector)
+  local items = {}
+  for _, item in ipairs(selector.items) do
+    if not vim.list_contains(selector.selected_item_ids, item.id) then table.insert(items, item) end
+  end
+  vim.ui.select(items, {
+    prompt = selector.title,
+    format_item = function(item) return item.title end,
+  }, function(item)
+    if item then
+      selector.on_select({ item.id })
+    else
+      selector.on_select(nil)
+    end
+  end)
+end
+
+return M