use system chdman if available, fails to run due to libSDL2 dependency

[acuteaura]

Paste the command

npx igir@latest copy zip report --dat DAT/*.zip --input Oxy/ --output Emulation/ --dir-dat-name

Describe the bug

chdman is available in path, but igir attempts to use one shipped via npm and falls flat on its face, because NixOS

ERROR: Oxy/<snip>.chd: failed to parse file: /home/nas/.npm/_npx/0d8028b15d717946/node_modules/@emmercm/chdman-linux-x64/chdman: error
while loading shared libraries: libSDL2-2.0.so.0: cannot open shared object file: No such file or directory

Expected behavior

igir checks path for tools it may need and prefers to use those; or ships static builds

Debug logs

N/A

DAT(s) used

N/A

igir version

v3.0.1

Node.js version

nixpkgs#nodejs_20

Operating system

NixOS 24.05 (Uakari)

Additional context

No response