fix: state standalone versions from their code

Each standalone profile records where its version is read: the source
at its pin (clk 2026-07-23-136-g9020107, shadps4 0.20.1 WIP, eden
v0.2.0-401-g26a03d2), the APK, binary or archive read (kind package),
or, where no reading can be made, kind unverified with the reason: a
host the tools cannot read, a forge gone or not answering, no build
recorded as read, a pin on another branch. Those keep their value,
unconfirmed.

emulators/magicengine.yml

@@ -6,6 +6,10 @@ upstream: closed-source
 author: "David Michel, Cedric Michel"
 profiled_date: "2026-10-20"
 core_version: "1.1.3"
+version_basis:
+  kind: package
+  url: "https://www.retrobat.ovh/repo/win64/stable/emulators/magicengine.7z"
+  artifact: "magicengine.7z, readme.txt"
 display_name: "NEC - PC Engine / CD-ROM / SuperGrafx (MagicEngine)"
 cores:
   - magicengine