feat(installers): 切换资源URL到main分支并添加更新脚本安装

将所有安装脚本的资源下载链接从固定commit路径切换为main分支原始路径，同时为各安装器新增下载并写入对应更新脚本的逻辑，支持后续程序更新。

install_ticketmachine.lua

@@ -1,5 +1,6 @@
 
-local URL_MACHINE_HTTP = "http://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/src/commit/d6aa03d3a78f8b6fbd2754bf3f4199392c6ef4c1/ticketmachine.lua"
+local URL_MACHINE_HTTP = "http://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/raw/branch/main/ticketmachine.lua"
+local URL_UPDATE_MACHINE = "http://gitea.fse-media.group/Henry_Du/FSE-Ticket.sys/raw/branch/main/update_machine.lua"
 
 local function writeFile(path, content, binary)
   local mode = binary and "wb" or "w"
@@ -67,12 +68,22 @@ if not ok or type(code) ~= "string" or #code == 0 then
   return
 end
 
+local okUpdate, updateCode = httpGet(URL_UPDATE_MACHINE)
+if not okUpdate or type(updateCode) ~= "string" or #updateCode == 0 then
+  print("Download failed: " .. tostring(updateCode or ""))
+  return
+end
+
 if not atomicWrite("startup", code, false) then
   print("Write failed: startup")
   return
 end
 atomicWrite("startup.lua", code, false)
 if fs.exists("ticketmachine.lua") then atomicWrite("ticketmachine.lua", code, false) end
+if not atomicWrite("update_machine.lua", updateCode, false) then
+  print("Write failed: update_machine.lua")
+  return
+end
 
 print("")
 print("Done.")