Squash fs support#129

Draft

martenrichter wants to merge 4 commits intoemscripten-forge:mainfrom

martenrichter:squashfssupport

Commits on Aug 17, 2025

Squashfs bootstrap
martenrichter
committed

Commits on Sep 7, 2025

sqfs via SharedArrayBuffer (intermediate step with bugs)
martenrichter
committed

Commits on Sep 28, 2025

Bugfixes and debug code (intermediate step with bugs)
martenrichter
committed

Commits on Oct 4, 2025

Remove debugging printouts and fix mount error detection
martenrichter
committed