chore: configure gitpod

[vil02]

This PR allows to use this repository in gitpod.

In the created environment, it is possible to successfully run the commands

busted -o utfTerminal .spec

and

luacheck .

Besides the fact that several repositories in TheAlgorithms are ready to use in gitpod, I think it is a good idea to have it, since it shows the newcomers how to create their own development environment.

[Panquesito7]

Looks great. Thanks! 🚀

[appgurueu]

Frankly, I'm not much of a fan of Gitpod; I don't really see the benefits.

All this does for a newcomer is set up a crippled Ubuntu image with Lua, Luarocks, Luacheck and Busted installed in a "cloud development environment". To actually commit their changes, users would further need to grant wide-reaching permissions to Gitpod. I don't think this is how newcomers should approach this, depending on Gitpod just to save them 5 minutes of setting up the dependencies.

Ultimately, programmers - and this includes newcomers to this repo - need to be able to set up a dev environment. Given the few and simple "dependencies" of this repo, I see no need to involve Docker - over a 3rd-party service, no less - yet; again, I don't think we should lead newcomers to use Gitpod.

(And even if Gitpod were to lower the barrier to entry, that won't necessarily be a good thing; I doubt that someone who would have been unable to set up a dev environment is able to make a substantial contribution.)

---

That said, to "show the newcomers how to create their own development environment", we should probably add a "getting started" section to the Readme - adding some links to the Lua / Luarocks / Luacheck / Busted installation / getting started pages, perhaps even a few ready-to-go commands and instructions for the most popular operating systems for convenience.

Newcomers will have to deal with dev env setup either way; neither Luacheck nor Busted invoke themselves, and for Luacheck I highly recommend editor support; it doesn't even seem possible to install a Luacheck extension on Gitpod out of the box:

Screenshot from local VSC:

Screenshot from Gitpod:

(perhaps this is fixable?)

---

If Gitpod support were accepted, this PR would also be missing a mention of Gitpod in the Readme.

[vil02]

@appgurueu I think that the cost of maintaining gitpod setup is minimal. The benefits are that (gitpod users) can contribute from a browser. If I would not find it useful, I would not create this PR.

[appgurueu]

I'm not strongly opposed to this; it is true that the maintenance cost is limited, though I think users would probably be best advised to avoid Gitpod (but at the end of the day, they are still free to choose).

[appgurueu]

Thanks for the PR!