require path with custom package.loaders

まだ誰も着手していません。

In my project I'm adding new package.loaders which means I'm able to import things that are not real files.
```lua
local bindings = require "bindings.core" -- This is not a real file
```
Any path starting with `bindings.` is treated differently. Is there a way to instruct the Lua Language Server to treat those specific requires in a special way and have them returning the right type annotation?
I'd like to not specify the @type every time I'm requiring these special packages.
```lua
---@type CoreBindings <---- I'm forced to specify the type
local bindings = require "bindings.core"
```
If there's a valid solution I'd need it to work outside of VS code. I'm running LuaLS as a standalone check.

Start by tracing how standalone LuaLS resolves require "bindings.core" and applies package.loaders information to type inference. Define how a configuration for the bindings. prefix would be supplied outside VS Code, then verify that the require receives CoreBindings without a repeated @type annotation.

索引モデルが issue の本文から書いたものです。