fix: split the np2 V98 font from font.bmp

NP2kai and meowPC98 read font.bmp (PC-98 bitmap) and FONT.ROM (V98) as
separate files, each through its own reader (NP2kai font/font.c:192-195,
meowPC98 font/font.c:180-181). The V98 names hung on font.bmp as aliases
let a collection without font.bmp serve the PC-88 2 KB font.rom there.
FONT.ROM is now its own entry, at least 0x46800 bytes (fontv98.c:8, 51).

Manifests: np2/FONT.ROM and np2kai/FONT.ROM are added where the platform
did not declare them, served by the V98 font bios/NEC/PC-98/font.rom.

install/romm.json

@@ -6,7 +6,7 @@
   "platform": "romm",
   "display_name": "RomM",
   "version": "5.4.0",
-  "generated": "2026-11-05T14:56:18Z",
+  "generated": "2026-11-05T18:31:29Z",
   "base_destination": "bios",
   "detect": [
     {
@@ -26,7 +26,7 @@
   "total_size": 872654387,
   "pack_files": 467,
   "pack_size": 872654387,
-  "total_omitted": 775,
+  "total_omitted": 777,
   "omitted_files": [
     {
       "dest": "32X_G_BIOS.BIN",
@@ -4072,6 +4072,16 @@
         "fbneo"
       ]
     },
+    {
+      "dest": "np2/FONT.ROM",
+      "name": "FONT.ROM",
+      "system": "",
+      "required": false,
+      "reason": "below_platform_folder",
+      "cores": [
+        "nekop2"
+      ]
+    },
     {
       "dest": "np2/bios9821.rom",
       "name": "bios9821.rom",
@@ -4162,6 +4172,16 @@
         "np2kai"
       ]
     },
+    {
+      "dest": "np2kai/FONT.ROM",
+      "name": "FONT.ROM",
+      "system": "",
+      "required": false,
+      "reason": "below_platform_folder",
+      "cores": [
+        "np2kai"
+      ]
+    },
     {
       "dest": "np2kai/ide.rom",
       "name": "ide.rom",