Add system-specific boot symbols and CPU instruction tests

Introduced symbol files for various Game Boy systems (CGB, AGB, MGB, SGB) to define boot sequences and functionalities. Included CPU instruction behavior tests, with detailed coverage of standard operations and interrupt handling. Added documentation for test execution and internal framework operations.

boot/sgb2.sym

@@ -0,0 +1,44 @@
+; File generated by rgblink
+BOOT:0000 EntryPoint
+BOOT:000b EntryPoint.clearVRAM
+BOOT:002b EntryPoint.clearBuffer
+BOOT:0036 EntryPoint.copyHeader
+BOOT:0039 EntryPoint.computeChecksum
+BOOT:0052 EntryPoint.decompressHeader
+BOOT:0064 EntryPoint.copyRTile
+BOOT:0073 EntryPoint.writeTilemapRow
+BOOT:0075 EntryPoint.writeTilemapByte
+BOOT:0080 SendData
+BOOT:0089 SendData.sendPacket
+BOOT:0091 SendData.sendByte
+BOOT:0095 SendData.sendBit
+BOOT:009d SendData.gotBit
+BOOT:00c2 Wait4Frames
+BOOT:00c4 Wait4Frames.waitVBlank
+BOOT:00cc Wait4Frames.wait
+BOOT:00d3 DecompressFirstNibble
+BOOT:00d4 DecompressSecondNibble
+BOOT:00d6 DecompressSecondNibble.decompressBit
+BOOT:00e6 RTile
+BOOT:00fc Done
+BOOT:0104 HeaderLogo
+BOOT:0134 HeaderTitle
+BOOT:013f HeaderMenufacturer
+BOOT:0143 HeaderCGBCompat
+BOOT:0144 HeaderNewLicensee
+BOOT:0146 HeaderSGBFlag
+BOOT:0147 HeaderCartType
+BOOT:0148 HeaderROMSize
+BOOT:0149 HeaderRAMSize
+BOOT:014a HeaderRegionCode
+BOOT:014b HeaderOldLicensee
+BOOT:014c HeaderROMVersion
+BOOT:014d HeaderChecksum
+BOOT:014e HeaderGlobalChecksum
+00:8000 vBlankTile
+00:8010 vLogoTiles
+00:8190 vRTile
+00:9800 vMainTilemap
+00:c000 wBuffer
+00:c060 wBufferEnd
+00:fffe hStackBottom