Revert to initial option set—prep for cleanup

This reverts commit b493def.

Revert "Update links to force Count of Monte-Cristo to start on cover"

This reverts commit 458a4ba.

Revert "Reduced / rearranged test groups"

This reverts commit 116a6f5.

Revert "Disable chapters plugin"

This reverts commit 4d3b8fe.

Revert "Moved test groups into a top-level <details>"

This reverts commit 57c01fa.

Revert "Group A uses default page numbering (swapped groups A and B)"

This reverts commit 34e3510.