Add examples to component docs

druid/base/button.lua

@@ -1,6 +1,17 @@
 --- Component to handle basic GUI button
 -- @module druid.button
 
+--- Component events
+-- @tfield druid_event on_click
+-- @tfield druid_event on_hold_click
+-- @tfield druid_event on_long_click
+-- @tfield druid_event on_double_click
+-- @table events
+
+--- Component fields
+-- @tfield node Main node
+-- @table fields
+
 local Event = require("druid.event")
 local const = require("druid.const")
 local helper = require("druid.helper")

druid/druid.lua

@@ -7,6 +7,11 @@
 -- to how to do your custom complex components to
 -- separate UI game logic to small files
 --
+--    require("druid.druid")
+--    function init(self)
+--        self.druid = druid.new(self)
+--    end
+--
 -- @module druid
 
 local const = require("druid.const")

druid/event.lua

@@ -1,7 +1,9 @@
 --- Lua event small library
+-- @module druid_event
 
 local class = require("druid.system.middleclass")
 
+-- @class DruidEvent
 local M = class("druid.event")