fix: join platform system names to profiles

The rom folder survey joined 463 folders to their default core's whole
profile, no system of it matching. SYSTEM_ALIASES, the one table
_norm_system_id reads, now folds ten more spellings of one machine:
apple2gs, astrocade, astrocde, creativision, gamepocketcomputer,
nintendo-super-game-boy, cps1, cps2, cps3 and pgm. The profiles that
used them take the canonical id (mame, groovymame, mamemess, mame0258,
mame0278, bsnes, mesen-s, mesence, jollycv, fbalpha2012 and its three
CPS cores, fbneo_cps12), as test_system_ids requires.

With bsnes and bsnes-hd now filing SGB1.sfc under one system, their
claims fold onto one report entry. _names_content read only the first
claim, hashless, and nSide's SGB1.sfc/ tree took the path before the
file. A hash on any folded claim now counts: every pack keeps the
destinations it had.

The site drops the eight display names the canonical ids replace and
names tvgames. README counts 533 systems instead of 541.

scripts/common.py

@@ -2663,6 +2663,20 @@ SYSTEM_ALIASES: dict[str, str] = {
     # profiles use only through these.
     "sega-segacd": "sega-megacd",
     "nes-fds": "nintendo-fds",
+    # One machine, two spellings across platform folders and profiles:
+    # Recalbox's apple2gs, Batocera's astrocade, KNULLI and RetroBat's
+    # astrocde, MiSTer's creativision, Batocera's gamepocketcomputer
+    # folder, BizHawk's Super Game Boy, the FBA 2012 board names.
+    "apple2gs": "apple-iigs",
+    "astrocade": "bally-astrocade",
+    "astrocde": "bally-astrocade",
+    "creativision": "crvision",
+    "gamepocketcomputer": "gamepock",
+    "nintendo-super-game-boy": "nintendo-sgb",
+    "cps1": "capcom-cps1",
+    "cps2": "capcom-cps2",
+    "cps3": "capcom-cps3",
+    "pgm": "igs-pgm",
 }