addition of gitpod configuration

[GitMensch]

The building instructions look well, but it always slows down if one needs to prepare things for a quick pull request. This is where gitpod.io comes in, which allows to create a build environment with a single click.

I'd like to contribute a gitpod configuration, allowing it to work "out of the box". This would mean adding a .gitpod.yml file, if that's something that has a high chance to be pulled in, either with or without a "code on GitPod" entry in the README. @vslavik please assign this issue to me or otherwise drop a note if you want to get a PR with that.

After this is contributed, the following may be done from the project site:

• login and install the app here, see https://github.com/apps/gitpod-io
• configuring pre-builds

but as noted, that's "optional";

Some benefits of GitPod: nice performance, running without costs, full coding and building and testing possible in the browser from anywhere, when pre-builds are active the development can start nearly in an instant, in theory also easy for people to start coding on the project GitPod is similar to GH code workspaces, but for open source contributions free of charge - and exists since years, while GH workspaces are relatively new

[vslavik]

This doesn't seem to make much sense for cross-platform desktop app.

[GitMensch]

It would "only" allow to:

• edit
• compile
• fix warnings/errors from the compile
• run automated tests (there are some, aren't they?)
• fix errors from the tests
• run the program in X (via vnc which is opened as embedded tab or separate browser tab)

It would not magically allow to test on Windows or Mac, but GNU/Linux with gcc and/or clang would be covered,

[vslavik]

It would "only" allow to:

So does any normal environment. You have build instructions in the README and for Linux. Nobody prevents you from using this thing personally either. But it is not appropriate to pollute the repository itself with config files for every person's favorite obscure tool.