AGENTS.md, CHANGELOG, and the three bumped binary-package READMEs all still
described the pre-overhaul state. Bring them in line with what ships:
- disassembleRom/findReferences/disassembleProject cover ALL 14 platforms now
  (GBA included), every CPU via native binutils objdump compiled to WASM.
- No hand-rolled JS decoders, no JS fallback — corrected the SMS/GG/GB
  'built-in JS decoder' and 'GBA has no bundled disassembler' claims.
- disassembleProject reassembles byte-exact via native as/ld/objcopy
  (cc65 ca65/ld65 for 6502/65816); removed the stale sjasm/rgbds/vasm list.
- Documented the honest GBA caveat (byte-exact rebuild, low readability until
  ARM/Thumb mode-tracking) and the Lynx wiring.
- READMEs note the new objdump (m68k/arm) and the z80-elf binutils (sdcc).

CHANGELOG 0.4.0 rewritten to match (it was never published; npm is at 0.3.1).