Refactor annotations to lua_ls style

lua/neocodeium/api_key.lua

@@ -13,7 +13,7 @@ function M.check()
    end
 end
 
----@return string?
+---@return string|nil
 function M.get()
    return api_key
 end

lua/neocodeium/chat.lua

@@ -23,7 +23,7 @@ nvim_create_autocmd("BufEnter", {
    end,
 })
 
----@return string?
+---@return string|nil
 local function get_project_root()
    return fs.root(uv.cwd() or 0, options.root_dir)
 end

lua/neocodeium/renderer.lua

@@ -56,7 +56,7 @@ local Renderer = {
 
 ---Adds virtual text into the `lnum` line number and `col` column.
 ---If `id` is nil then a new id will be generated.
----@param id extmark_id?
+---@param id? extmark_id
 ---@param str string text to display
 ---@param lnum lnum
 ---@param col col
@@ -88,7 +88,7 @@ end
 
 ---Adds virtual text below the line with `lnum` number.
 ---If `id` is nil then a new id will be generated.
----@param id extmark_id?
+---@param id? extmark_id
 ---@param text string text to display, will be split into lines at "\n"
 ---@param lnum lnum
 ---@return extmark_id
@@ -182,7 +182,7 @@ end
 
 ---@private
 ---@param lnum lnum
----@param text string?
+---@param text? string
 function Renderer:display_block(text, lnum)
    if text then
       if not self.block.id or self.block.text ~= text then
@@ -197,7 +197,7 @@ end
 ---@private
 ---@param items compl.item[]
 ---@param index integer
----@param pending boolean?
+---@param pending? boolean
 function Renderer:display_label(items, index, pending)
    if not (options.show_label and self.label.enabled) then
       return

lua/neocodeium/server.lua

@@ -32,15 +32,15 @@ local Server = {
 -- Auxiliary functions ------------------------------------- {{{1
 
 ---@param path filepath
----@return filepath?
+---@return filepath|nil
 local function find_port_file(path)
    return fs.find(function(name)
       return name:match("^%d%d%d%d%d?$")
    end, { path = path, type = "file" })[1]
 end
 
 ---@param t table list to append data
----@return fun(_, data: string?)
+---@return fun(_, data?: string)
 local function data_appender(t)
    return function(_, data)
       if data then
@@ -178,7 +178,7 @@ end
 ---Sends request to the server
 ---@param type request_type
 ---@param data request_data
----@param on_exit fun(response: response)?
+---@param on_exit? fun(response: response)
 function Server:request(type, data, on_exit)
    ---@type url
    local uri = "http://127.0.0.1:"

lua/neocodeium/utils/stdio.lua

@@ -18,7 +18,7 @@ end
 
 ---Reads file content into string, on failure returns nil
 ---@param path filepath
----@return string?
+---@return string|nil
 function M.read(path)
    local f = io.open(path, "rb")
    if f then