[Feature Request] Multiple-project/Monorepo support

Nobody has claimed this yet.

I work with a large monorepo that contains multiple Lua project roots. You can actually see the list of Lua projects here, as an example: https://github.com/SmartThingsCommunity/SmartThingsEdgeDrivers/tree/main/drivers/SmartThings

Loading this entire repo at once doesn't work well because of how the `require` paths are established via `runtime.path`. The primary issue is that it leads to ambiguous require resolution if two of the roots have files with the same name.

Obviously, one workaround is to use a multi-root workspace and only add the folders for the projects I currently care about, but that's tedious since I'd be adding and removing folders from the workspace constantly.

One idea that I had was being able to specify an "entrypoint" glob. The plugin could traverse up the directory tree looking for a file that matches the glob, and then use that as the root for all local requires. But that might not be a good "general" solution even though it works well for my use case.

Start by reviewing how runtime.path establishes local require roots and how that behaves when the repository contains multiple Lua project roots. The issue suggests an entrypoint glob as one possible direction, but does not specify the preferred design or files to change. Done should mean loading the monorepo without ambiguous require resolution.

Written by the indexing model from the issue text.