[Feature Request] Add Lua config file support

还没有人认领这个 Issue。

There are some Lua files that are used for configuration, such as `.busted` or `*.rockspec` files. It would be nice if:

- Any globals defined in them are ignored by default
- Global types and return types can be defined for them in a type definition file

This behavior could all be described by creating a type definition file with a special `(config)` option next to `@meta`. The require name is replaced by a Lua pattern that matches the filename or URI. Either that, or it could be specified as a config-specific option using `---@meta (config: PATTERN)`

```lua
-- library/rockspec.d.lua

---@meta (config) "[%w%.%-%_]+%.rockspec$"

---the rockspec format
---@type string
_G.rockspec_format = nil

---the package name
---@type string
_G.package = nil

---the package version
---@type string
_G.version = nil

---a description of the rock
---@class luarocks.rockspec.description
---@field summary string? -- a short sentence that succinctly describes the rock
---@field description string? -- a paragraph-size description that describes the rock
---@field ...
_G.description = {}
```

For configurations that require returning a table, you could define a local variable with the right type and return it.

```lua
-- library/busted.d.lua

---@meta (config) "%.busted$"

---@class .busted.config
---@field coverage boolean? -- use luacov for coverage
---@field verbose boolean? -- print more things
---@field ...

---a dictionary of Busted configurations. You can specify which one using the
---`--run` option. Uses `default` if no configuration is specified
---@class .busted
---@field default .busted.config?
---@field [string] .busted.config?
local busted_config = {}

return busted_config
```

首先查看提议的特定于配置的 `@meta` 语法，以及 `library/rockspec.d.lua` 和 `library/busted.d.lua` 中的示例定义。比较匹配配置文件名或 URI 的各种方案。当 Lua 配置文件默认可以忽略全局变量，并使用匹配的定义文件中的类型和返回值定义时，即表示完成。

由索引模型根据 Issue 内容生成。