POPS: Boot PS1 disc images as converted EBOOTs made on the fly

A cue sheet, a CloneCD .ccd, or a bare .bin, .img or .iso of a PS1 disc
now boots on the firmware's POPS, as the converted EBOOT.PBP popstation
would make from it. PS1EbootFileLoader builds the PBP header, PARAM.SFO
(the disc ID from SYSTEM.CNF) and the PSISOIMG header, TOC and block
index, and serves the disc image from the image's own files. Each block
of 16 sectors is a stored DEFLATE block: the manager won't read an image
of uncompressed blocks in its own format, but the converted PBP's inflate
takes stored ones, and with every block the same size, reads map straight
onto the files. Nothing is compressed or written anywhere.

Cue sheets can have any number of files, AUDIO tracks, INDEX 00 and
PREGAP, and a missing FILE falls back to the cue sheet's own name. A
2048-byte .iso gets Mode 2 Form 1 sectors made around its user data.

The EBOOT is mounted as the only file in host0:, through BlobFileSystem,
which now saves its open handles in savestates. The game browser lists
.cue, .ccd, .bin and .img, leaving out the .bin and .img files a cue
sheet or .ccd next to them describes, and a bare image opened directly
goes through the cue sheet that names it. GameInfoCache reads the title
and ID of these, and of real PS1 EBOOTs, from their PARAM.SFO.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Core/FileSystems/BlobFileSystem.h

@@ -17,9 +17,9 @@
 
 #pragma once
 
-// This is used for opening a debug file as a blob, and mounting it.
+// This is used for opening a file as a blob, and mounting it.
 // Importantly, uses a fileLoader for all access, so http:// URLs are supported.
-// As of writing, only used by GE dump replay.
+// Used by GE dump replay, and for the EBOOT a PS1 disc image is presented as.
 
 #include <map>
 #include <string>