feat: Allow inline buttons and popup confirmation for both ACP and normal Providers (#2760)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

lua/avante/config.lua

@@ -517,6 +517,10 @@ M._defaults = {
     enable_fastapply = false,
     include_generated_by_commit_line = false, -- Controls if 'Generated-by: <provider/model>' line is added to git commit message
     auto_add_current_file = true, -- Whether to automatically add the current file when opening a new chat
+    --- popup is the original yes,all,no in a floating window
+    --- inline_buttons is the new inline buttons in the sidebar
+    ---@type "popup" | "inline_buttons"
+    confirmation_ui_style = "inline_buttons",
   },
   prompt_logger = { -- logs prompts to disk (timestamped, for replay/debugging)
     enabled = true, -- toggle logging entirely