Ability to use specific enum keys as params

还没有人认领这个 Issue。

It would be nice to be able to use specific enum keys as params. For example today if you try to do something like this:

```
---@enum TestEnum
TestEnum = {
ONE = 1,
TWO = 2,
THREE = 3,
}

---@param test TestEnum.ONE
local function test(test)
end

test(TestEnum.ONE)
test(1)
```

You will get an error:
```
Cannot assign `integer` to parameter `TestEnum.ONE`.
- `integer` cannot match `TestEnum.ONE`
- Type `integer` cannot match `TestEnum.ONE`
- Type `number` cannot match `TestEnum.ONE`
```

Interestingly lls understands that TestEnum.ONE is a real thing just not that it is equal to TestEnum.ONE or 1. For exmaple if you try this:
```
---@enum TestEnum
TestEnum = {
ONE = 1,
TWO = 2,
THREE = 3,
}

---@param test TestEnum.One
local function test(test)
end

test(TestEnum.ONE)
test(1)
```
You will get an error:
```
---@param test TestEnum.NonEnumValue
```

由于 issue 中没有确定文件、测试或入口点，因此请先在 lua-language-server 中定位 enum 类型检查和参数可赋值性的处理。完成的标准是：TestEnum.ONE 可用于 TestEnum.ONE，且其底层值 1 得到一致处理，同时无效的 enum 键仍被拒绝。

由索引模型根据 Issue 内容生成。