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/epsxe.yml

@@ -9,6 +9,12 @@ version_source:
 author: "calb, _Demo_, Galtor (ePSXe Software S.L.)"
 profiled_date: "2026-08-11"
 core_version: "2.0.18"
+version_basis:
+  kind: package
+  url: "https://www.epsxe.com/files/ePSXe2018.zip"
+  pattern: 'ePSXe(\d)(\d)(\d+)\.zip'
+  format: "{1}.{2}.{3}"
+  artifact: "ePSXe2018.zip"
 display_name: "Sony - PlayStation (ePSXe)"
 cores:
   - epsxe