feat: fetch ollama models to display in the model selector (#2287)

lua/avante/types.lua

@@ -291,6 +291,19 @@ vim.g.avante_login = vim.g.avante_login
 ---@alias AvanteLLMStopCallback fun(opts: AvanteLLMStopCallbackOptions): nil
 ---@alias AvanteLLMConfigHandler fun(opts: AvanteSupportedProvider): AvanteDefaultBaseProvider, table<string, any>
 ---
+---@class AvanteProviderModel
+---@field id string
+---@field name string
+---@field display_name string
+---@field provider_name string
+---@field version string
+---@field tokenizer? string
+---@field max_input_tokens? integer
+---@field max_output_tokens? integer
+---@field policy? boolean
+---
+---@alias AvanteProviderModelList AvanteProviderModel[]
+---
 ---@class AvanteProvider: AvanteSupportedProvider
 ---@field parse_curl_args? AvanteCurlArgsParser
 ---@field parse_stream_data? AvanteStreamParser
@@ -315,6 +328,7 @@ vim.g.avante_login = vim.g.avante_login
 ---@field on_error? fun(result: table<string, any>): nil
 ---@field transform_tool? fun(self: AvanteProviderFunctor, tool: AvanteLLMTool): AvanteOpenAITool | AvanteClaudeTool
 ---@field get_rate_limit_sleep_time? fun(self: AvanteProviderFunctor, headers: table<string, string>): integer | nil
+---@field models_list? fun(self): AvanteProviderModelList | nil
 ---
 ---@alias AvanteBedrockPayloadBuilder fun(self: AvanteBedrockModelHandler | AvanteBedrockProviderFunctor, prompt_opts: AvantePromptOptions, request_body: table<string, any>): table<string, any>
 ---