Request to allow mutiline `@type` values

Nobody has claimed this yet.

Sometimes, a `@type` value can be very long, i.e.

```lua
---@type {filepath: string?, type: 'unknown'|'binary'|'stock'|'path', loader: function}
```

Of course, while I could clean-up the above by replacing `type` with its own alias, I still think it would be nice to be able to do this:

```lua
---@type {
--- filepath: string?,
--- type: 'unknown'|'binary'|'stock'|'path',
--- loader: function
---}
```

The issue provides no file or test entry point. Start by locating the annotation handling for @type values, then add coverage for the shown multiline form and confirm that its structured type is parsed the same way as the single-line form.

Written by the indexing model from the issue text.