#1207 add sample for description for LuaDoc

Author: sumneko

locale/en-us/script.lua

@@ -546,3 +546,10 @@ CLI_CHECK_SUCCESS =
 'Diagnosis completed, no problems found'
 CLI_CHECK_RESULTS =
 'Diagnosis complete, {} problems found, see {}'
+
+LUADOC_DESC_CLASS =
+[=[
+```lua
+---@class <name> [: <parent>[, <parent2>, ...]]
+```
+]=]

script/core/completion/completion.lua

@@ -1546,6 +1546,7 @@ local function tryluaDocCate(word, results)
             results[#results+1] = {
                 label       = docType,
                 kind        = define.CompletionItemKind.Event,
+                description = lang.script('LUADOC_DESC_' .. docType:upper())
             }
         end
     end