[Feature Request] Option to have docs on numeric keys on tables

For example, a map of status code to some table.

local my_status_code_map = {
  -- attached docs
  -- attached docs (continued)
  [200] = { something = "here" }
}
local foo = my_status_code_map[200]
--                            ^^^^^--- i'd like to be able to hover here to get the docs attached to `[200]` in the table

該 issue 沒有列出檔案、測試或進入點；首先定位 Lua language server 中的懸停處理和表格鍵解析。完成的標準是：將游標停在 my_status_code_map[200] 上時顯示附加到 [200] 的文件，並為數值鍵範例提供涵蓋。