fix(installer): 更新安装程序版本至0.3.7 Beta 9

docs(help): 更新about.hlp中的网站链接至新域名
refactor(help): 优化pkg_download_en.hlp的代码块显示格式
feat(imageview): 添加图像加载错误提示和注释说明
style(time): 修复帮助文档格式错误
feat(shell): 添加欢迎界面图形显示
test: 新增imageview和help文档的测试程序

data/computercraft/lua/rom/programs/shell.lua

@@ -27,10 +27,24 @@ local textutils = require("textutils")
 
 if os.version then
   textutils.coloredPrint(colors.yellow, os.version(), colors.white)
+  local image = paintutils.parseImage([[
+ f  f
+
+f    f
+ ffff
+  ]])
+  paintutils.drawImage(image, term.getCursorPos())
 else
   textutils.coloredPrint(colors.yellow, rc.version(), colors.white)
+    local image = paintutils.parseImage([[
+ f  f
+
+f    f
+ ffff
+  ]])
+  paintutils.drawImage(image, term.getCursorPos())
 end
--- textutils.coloredPrint(colors.yellow, "Welcome using the beta version of LeonOS!"colors.white)
+textutils.coloredPrint(colors.yellow, "Welcome using the beta version of LeonOS!", colors.white)
 
 thread.vars().parentShell = thread.id()
 shell.init(_ENV)