Add nightly build download page

[J5lx]

In the past we talked about how the Google Drive interface isn’t that nice for our Nightly Builds. So with that in mind I sat down today and made a custom interface that fetches the file list from Google Drive and the workflow runs from GitHub and combines that information into a nice overview. The interface isn’t particularly fancy, but IMO it’s still better than what we have now. The code also isn’t particularly fancy but I’d say it’s not particularly ugly either. No dependencies, just plain old JavaScript.

Resolves pencil2d/pencil#1153 (I think?)

[Jose-Moreno]

That's great! nice job @J5lx A few questions, so each link would be a nightly build with the respective commit message that triggered that build? also what will happen when the google drive nightly builds are cleaned?

FYI after a certain amount of builds, chchwy has a script that erases the oldest ones if I'm not mistaken, so what will happen in that page? will it always stay up to date with the current nightly builds? or will it leave a history?

While it would be nice to have a history of the nightly builds, since those links get deleted with time, for presentation purposes it would be better if the actual links only reflect what the google drive folder has at any given time. I assume that since you're only fetching the list this won't happen, but I just want to be sure. Thoughts?

[J5lx]

Yes, the description is from the commit that triggered the build, and it is linked to the commit on GitHub.

You’re correct about the data “freshness” as well. The list is always compiled on-the-fly based on the latest data from GitHub and Google Drive, so it won’t become outdated.

[scribblemaniac]

Sorry but I have only just seen this today. I love the idea and it is working well with the exception of the occasional "Unable to retrieve information". I have fixed this and added some other things I think would improve the page in a PR (J5lx#1). Once that PR is merged, I think this PR will be ready to merge as well.

The only things I think could be improved that are not included here nor in my PR are:

• An occasional refresh of the list (even just a couple times a day) in case a user feels leaves it open and expects to have the latest data.
• UI improvements for downloading the latest build from the nightly builds page. The vast majority of users are going to want to download the latest build, so it would be nice if there were direct links to those builds front-and-center. I'm imagining this as being similar to the way the stable downloads look on the main downloads page.

[scribblemaniac]

Good to go!