feat(pkg): 更新包管理系统并升级至LeonOS 0.3.6

- 将包安装目录从/leonos/packages迁移至/packages
- 更新版本号至0.3.6
- 修改installer.lua以正确处理packages目录
- 更新pkg.lua程序适配新的包路径
- 添加示例包文件到新位置

data/computercraft/lua/packages/example-pkg/1.0.0/completions/example.lua

@@ -0,0 +1,10 @@
+-- example command completion
+
+local shell = require('shell')
+local completion = require('completion')
+
+-- Set up completion for example command
+shell.setCompletionFunction('example', completion.build({
+  -- 这里可以添加example命令的补全逻辑
+  completion.choice{'--help', '-h'}
+}))

data/computercraft/lua/packages/example-pkg/1.0.0/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "example",
+  "version": "1.0.1",
+  "description": "An example package for LeonOS",
+  "author": "LeonMMcoset",
+  "license": "MIT",
+  "dependencies": {},
+  "files": [
+    "programs/example.lua",
+    "completions/example.lua"
+  ]
+}

data/computercraft/lua/packages/example-pkg/1.0.0/programs/example.lua

@@ -0,0 +1,25 @@
+-- Example Package Program
+local colors = require('colors')
+local term = require('term')
+
+function drawTopBar()
+  local w, h = term.getSize()
+  term.setBackgroundColor(colors.cyan)
+  term.setTextColor(colors.white)
+  term.setCursorPos(1, 1)
+  term.clearLine()
+  local title = "=== Example Package v1.0.0 ==="
+  local pos = math.floor((w - #title) / 2) + 1
+  term.setCursorPos(pos, 1)
+  term.write(title)
+  term.setBackgroundColor(colors.black)
+  term.setTextColor(colors.white)
+  term.setCursorPos(1, 3)
+end
+
+drawTopBar()
+print("\nThis is an example package that demonstrates the features of LeonOS package manager.")
+print("\nUsage:")
+print("  pkg install example-pkg  - Install this package")
+print("  pkg remove example-pkg   - Uninstall this package")
+print("  pkg list                 - List installed packages")

data/computercraft/lua/packages/installed.json

@@ -0,0 +1,3 @@
+{
+  "packages": {}
+}