feat: supports reasoning_content (#1159)

lua/avante/llm.lua

@@ -139,6 +139,8 @@ M._stream = function(opts)
   ---@type AvanteCurlOutput
   local spec = Provider.parse_curl_args(Provider, code_opts)
 
+  local resp_ctx = {}
+
   ---@param line string
   local function parse_stream_data(line)
     local event = line:match("^event: (.+)$")
@@ -147,7 +149,7 @@ M._stream = function(opts)
       return
     end
     local data_match = line:match("^data: (.+)$")
-    if data_match then Provider.parse_response(data_match, current_event_state, handler_opts) end
+    if data_match then Provider.parse_response(resp_ctx, data_match, current_event_state, handler_opts) end
   end
 
   local function parse_response_without_stream(data)