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/retrodeck.json

@@ -6,7 +6,7 @@
   "platform": "retrodeck",
   "display_name": "RetroDECK",
   "version": "0.10.10b",
-  "generated": "2026-11-05T14:56:18Z",
+  "generated": "2026-11-05T18:31:29Z",
   "base_destination": "",
   "detect": [
     {
@@ -292,10 +292,10 @@
       "source": "bios/dc/dc_nvmem.bin"
     }
   ],
-  "total_files": 8904,
-  "total_size": 9019527558,
-  "pack_files": 8906,
-  "pack_size": 9019527558,
+  "total_files": 8906,
+  "total_size": 9020105094,
+  "pack_files": 8908,
+  "pack_size": 9020105094,
   "total_omitted": 66,
   "omitted_files": [
     {
@@ -133242,6 +133242,19 @@
         "nec-pc-98"
       ]
     },
+    {
+      "dest": "bios/np2/FONT.ROM",
+      "sha1": "78ba9960f135372825ab7244b5e4e73a810002ff",
+      "sha256": "8db165d567e13bce3f50ee495975671faa5a0ff332dcb08e187aa91125c81ec6",
+      "size": 288768,
+      "repo_path": "bios/NEC/PC-98/font.rom",
+      "cores": [
+        "nekop2"
+      ],
+      "systems": [
+        "nec-pc-98"
+      ]
+    },
     {
       "dest": "bios/np2/sound.rom",
       "sha1": "d5dbc4fea3b8367024d363f5351baecd6adcd8ef",
@@ -133411,6 +133424,19 @@
         "nec-pc-98"
       ]
     },
+    {
+      "dest": "bios/np2kai/FONT.ROM",
+      "sha1": "78ba9960f135372825ab7244b5e4e73a810002ff",
+      "sha256": "8db165d567e13bce3f50ee495975671faa5a0ff332dcb08e187aa91125c81ec6",
+      "size": 288768,
+      "repo_path": "bios/NEC/PC-98/font.rom",
+      "cores": [
+        "np2kai"
+      ],
+      "systems": [
+        "nec-pc-98"
+      ]
+    },
     {
       "dest": "bios/np2kai/sound.rom",
       "sha1": "d5dbc4fea3b8367024d363f5351baecd6adcd8ef",