docs: add function explain doc

lua/Trans/core/frontend.lua

@@ -3,16 +3,18 @@ local conf = Trans.conf
 local frontend_opts = conf.frontend
 
 
+---Setup frontend Keymaps
+---@param frontend TransFrontend
 local function set_frontend_keymap(frontend)
     local set = vim.keymap.set
-    local keymap_opts = { silent = true, expr = true }
+    local keymap_opts = { silent = true, expr = false, }
 
-    for action, key in pairs(frontend.opts.keymap) do
+    for action, key in pairs(frontend.opts.keymaps) do
         set('n', key, function()
             local instance = frontend.get_active_instance()
 
             if instance then
-                instance:execute(action)
+                coroutine.wrap(instance.execute)(instance, action)
             else
                 return key
             end
@@ -21,11 +23,21 @@ local function set_frontend_keymap(frontend)
 end
 
 
-local M = setmetatable({}, {
+---@class TransFrontend
+---@field opts TransFrontendOpts
+---@field get_active_instance fun():TransFrontend?
+---@field process fun(data: TransData, result: TransResult)
+---@field wait fun(self: TransFrontend, result: TransResult, name: string, timeout: integer)
+---@field execute fun(action: string) @Execute action for frontend instance
+
+---@class Trans
+---@field frontend TransFrontend
+return setmetatable({}, {
     __index = function(self, name)
         local opts = vim.tbl_extend('keep', frontend_opts[name] or {}, frontend_opts.default)
-        local frontend = require('Trans.frontend.' .. name)
 
+        ---@type TransFrontend
+        local frontend = require('Trans.frontend.' .. name)
 
         frontend.opts = opts
         self[name] = frontend
@@ -35,7 +47,3 @@ local M = setmetatable({}, {
         return frontend
     end
 })
-
-
-
-return M