feat: aside 可配置隐藏/增加按钮可展开或收缩aside

layout/includes/layout.pug

@@ -1,7 +1,8 @@
+- var htmlClassHideAside = theme.aside.enable && theme.aside.hide ? 'hide-aside' : ''
 - var hideAside = !theme.aside.enable || page.aside === false ? 'hide-aside' : ''
 
 doctype html
-html(lang=config.language data-theme=theme.display_mode)
+html(lang=config.language data-theme=theme.display_mode class=htmlClassHideAside)
   head
     include ./head.pug
   body

layout/includes/rightside.pug

@@ -23,6 +23,10 @@
       button#rightside_config(type="button" title=_p("rightside.setting"))
         i.fas.fa-cog
 
+    if theme.aside.enable && theme.aside.button
+      button#hide-aside-btn(type="button")
+        i.fas.fa-arrows-alt-h
+
     if theme.chat_btn
       button#chat_btn(type="button" title=_p("rightside.chat_btn"))
         i.fas.fa-sms