refactor: extract sizes to structured fields

emulators/melonds.yml

@@ -24,7 +24,7 @@ files:
     hle_fallback: true
     size: 4096
     validation: {core: [size], upstream: [size, crc32]}
-    crc32: "0x2ab23573"
+    crc32: 2ab23573
     source_ref: "src/NDS.h:196, src/NDS.cpp:467-477, src/frontend/Util_ROM.cpp:99-111"
     note: "FreeBIOS fallback (src/FreeBIOS.h); native needed for Key1 cartridge crypto"
 
@@ -35,7 +35,7 @@ files:
     hle_fallback: true
     size: 16384
     validation: {core: [size], upstream: [size, crc32]}
-    crc32: "0x1280f0d5"
+    crc32: 1280f0d5
     source_ref: "src/NDS.h:197, src/NDS.cpp:482-492, src/frontend/Util_ROM.cpp:117-131"
     note: "FreeBIOS fallback (src/FreeBIOS.h); native needed for Key1 init at offset 0x0030"
 
@@ -44,6 +44,8 @@ files:
     description: "NDS firmware image"
     required: false
     hle_fallback: true
+    min_size: 262144
+    max_size: 524288
     validation: [size]
     source_ref: "src/SPI.cpp:192-211, src/frontend/Util_ROM.cpp:174-195"
     note: "Generated 128KB firmware as fallback; native must be 256KB or 512KB for boot"
@@ -55,7 +57,7 @@ files:
     required: true
     size: 65536
     validation: {core: [size], upstream: [size, crc32]}
-    crc32: "0xBAE84F6C"
+    crc32: bae84f6c
     source_ref: "src/DSi.h:33, src/DSi.cpp:587-599, src/frontend/Util_ROM.cpp:145-156"
 
   - name: dsi_bios7.bin
@@ -64,7 +66,7 @@ files:
     required: true
     size: 65536
     validation: {core: [size], upstream: [size, crc32]}
-    crc32: "0x4316CC42"
+    crc32: 4316cc42
     source_ref: "src/DSi.h:34, src/DSi.cpp:604-620, src/frontend/Util_ROM.cpp:158-170"
     note: "Contains eMMC key-Y at offset 0x8308 for NAND init"