Add a Gitpod descriptor

[pepeiborra]

Develop HLS from your browser in a prebuilt environment.

Try it with https://gitpod.io/#https://github.com/haskell/haskell-language-server/tree/gitpod

The init script uses ghcup to install GHC and cabal to prebuild all the dependencies of the test suites.

Using Nix is not an option since the root file system is read-only.

The Free tier allows for 50h monthly hours and the hardware is beefy (>80 cores, 64GB RAM).

Super handy for testing compatibility with diverse GHC versions.

[jneira]

nice! i tried to add one of this but i was not able to make vscode see cabal nor ghc, maybe cause we did not update the extension in vscodium until recently, many thanks!

[pepeiborra]

nice! i tried to add one of this but i was not able to make vscode see cabal nor ghc, maybe cause we did not update the extension in vscodium until recently, many thanks!

It is a bit tricky, but not impossible hopefully