fix: send unreleased platforms to the installer

A release recorded without a platform's pack linked its button to that release, which serves no pack for AmberELEC, EmuELEC, KNULLI, MinUI, NextUI or MyMinUI. The cell now names the release and points to the installer, which reads the file lists on main. Core folder links resolve each core name to the profile page that describes it (mednafen_vb is beetle_vb).

scripts/generate_readme.py

@@ -134,14 +134,18 @@ def download_links(
     A pack published whole gets one link labelled *label*. A pack in parts
     gets one link per part, since every part is needed. *repo* is the
     repository URL, absolute or relative, and *attrs* a MkDocs attribute list
-    put after each link. Without a pack in the record the link falls back to
-    the latest release page.
+    put after each link. Without a recorded release the link is the latest
+    release page. A release recorded without this platform's pack says so and
+    names the installer, which reads the file lists on main: a button to the
+    release served six platforms a page with no pack for them.
     """
     pack = release_record.pack_for(platform_name, record)
     tag = record.get("tag")
     assets = pack.get("assets") if pack else None
-    if not tag or not assets:
+    if not tag:
         return f"[{label}]({repo}/releases/latest){attrs}"
+    if not assets:
+        return f"Not in {tag}: [use the installer]({SITE_URL}wiki/installer/)"
     urls = [f"{repo}/releases/download/{tag}/{asset}" for asset in assets]
     if len(urls) == 1:
         return f"[{label}]({urls[0]}){attrs}"