Make it easier to run for contributors

Currently you can only test some functions of Unicodable, other bots require a bunch existing rakudo revisions (which takes a few days to get done). In other words, you can only develop stuff on the server where the bots are running…

We should add some “contributor” mode for build.p6 that would only build maybe 5 revisions, and make sure that most bots are functional with just these 5 builds.

Bots that you can run and TEST locally:

• Bisectable – OK but may fail on the first run
• Committable – OK but may fail on the first run
• Benchable – OK but may fail on the first run
• Evalable – OK
• Statisfiable
• Unicodable – OK
• Bloatable – requires bloaty that you have to compile yourself…
• Quotable
• Greppable – you have to run it twice to make it pass its tests (it pulls perl6-all-modules on the first run and times out), also seems to be too slow on my machine to get things done in time
• Coverable – failing tests
• Releasable
• Nativecallable
• Squashable – no tests yet
• Reportable – ± no tests yet, but will run fine locally (more info on Reportable#running-the-bot-locally)
• Notable
• Shareable – no tests yet

Start with build.p6 and inspect how the bots listed in the issue obtain and use Rakudo revisions. Run the currently marked-local bots to establish the baseline. Done means a contributor mode builds about five revisions and the remaining bots are functional and testable locally where feasible.