chore: 更新版本号至0.3.5并优化pkg.lua的JSON序列化

将installer.lua、bios.lua中的版本号从0.3.4更新至0.3.5
修改pkg.lua中JSON序列化配置，禁用pretty打印以提高性能

data/computercraft/lua/bios.lua

@@ -1,4 +1,4 @@
-_G._HOST = _G._HOST .. " (LeonOS 0.3.4)"
+_G._HOST = _G._HOST .. " (LeonOS 0.3.5)"
 local fs = rawget(_G, "fs")
 
 _G._RC_ROM_DIR = _RC_ROM_DIR or (...) and fs.exists("/leonos") and "/leonos" or "/rom"
@@ -32,7 +32,7 @@ local rc = {
   _VERSION = {
     major = 0,
     minor = 3,
-    patch = 4
+    patch = 5
   },
   queueEvent  = pull(os, "queueEvent"),
   startTimer  = pull(os, "startTimer"),

data/computercraft/lua/rom/programs/pkg.lua

@@ -62,7 +62,7 @@ end
 local function save_installed_db(db)
   local file = io.open(pkg_config.installed_db, "w")
   if file then
-    file:write(textutils.serializeJSON(db, { pretty = true }))
+    file:write(textutils.serializeJSON(db, false))
     file:close()
     return true
   end

installer.lua

@@ -1,5 +1,5 @@
 -- LeonOS installer
-local INSTALLER_VERSION = "0.3.4"
+local INSTALLER_VERSION = "0.3.5"
 local DEFAULT_ROM_DIR = "/leonos"
 
 print("Start loading LeonOS installer ("..INSTALLER_VERSION..")...")