feat: 更新版本号至0.2.2并改进开机音乐

- 将installer.lua和bios.lua中的版本号从0.2.1更新至0.2.2
- 改进50_audio.lua中的开机音乐实现，使用更精确的乐器音高参数

data/computercraft/lua/bios.lua

@@ -1,4 +1,4 @@
-_G._HOST = _G._HOST .. " (LeonOS 0.2.1)"
+_G._HOST = _G._HOST .. " (LeonOS 0.2.2)"
 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 = 2,
-    patch = 1
+    patch = 2
   },
   queueEvent  = pull(os, "queueEvent"),
   startTimer  = pull(os, "startTimer"),

data/computercraft/lua/rom/startup/50_audio.lua

@@ -6,20 +6,22 @@ local speaker = peripheral.find("speaker")
 -- 检查是否连接了扬声器
 if speaker then
   -- 简单的开机音乐（C大调音阶）
+  -- 格式: {instrument = 乐器, pitch = 音高(半音), duration = 持续时间}
   local notes = {
-    {note = "C4", duration = 0.25},
-    {note = "D4", duration = 0.25},
-    {note = "E4", duration = 0.25},
-    {note = "F4", duration = 0.25},
-    {note = "G4", duration = 0.25},
-    {note = "A4", duration = 0.25},
-    {note = "B4", duration = 0.25},
-    {note = "C5", duration = 0.5}
+    {instrument = "harp", pitch = 6, duration = 0.25},  -- C4
+    {instrument = "harp", pitch = 8, duration = 0.25},  -- D4
+    {instrument = "harp", pitch = 10, duration = 0.25}, -- E4
+    {instrument = "harp", pitch = 11, duration = 0.25}, -- F4
+    {instrument = "harp", pitch = 13, duration = 0.25}, -- G4
+    {instrument = "harp", pitch = 15, duration = 0.25}, -- A4
+    {instrument = "harp", pitch = 17, duration = 0.25}, -- B4
+    {instrument = "harp", pitch = 18, duration = 0.5}   -- C5
   }
 
   -- 播放音乐
   for _, note_info in ipairs(notes) do
-    speaker.playNote(note_info.note)
+    -- 播放音符，使用默认音量1.0
+    speaker.playNote(note_info.instrument, 1.0, note_info.pitch)
     rc.sleep(note_info.duration)
   end
 end