Add Platform Builder

[MichaelHinrichs]

SteamDB app page links to a few games using this

https://steamdb.info/app/1135810/ https://steamdb.info/app/1562980/ https://steamdb.info/app/1776300/ https://steamdb.info/app/2050490/

Possible false positives https://steamdb.info/app/652030/ https://steamdb.info/app/1063710/

Brief explanation of the change

Detect Platform Builder by it's gmez file type. Since Platform Builder itself was made in GameMaker, any Platform Builder app is likely currently detected as using GameMaker. I find it appropriate to detect both, so don't @ me about writing an "Evidence" file unless steamdb stops checking if it decides an app is GameMaker or something.

[SteamDB-Tracker]

After running changed rules in this pull request (this bot only tests rules.ini changes):

Changed technologies: Engine.Platform_Builder

These apps now match: (33) 588690 650990 652030 660280 818210 835650 885030 1037540 1063710 1088580 1290790 1557540 1562980 1592930 1598710 1629190 1776300 1785260 1841680 1896920 1930310 1986900 2008940 2016140 2050450 2050490 2111400 2111410 2122330 2187270 2189720 2591250 2663480

Please confirm that all these changed apps are correct.