Update stub to account for separate src_span and src_file in IPE entries
As of GHC 9.6.1 InfoProvEnt's srcspan field has been split into src_span and src_file in order to reduce IPE size. See ghc@9b572d54
Also fixes a number of warnings, drops some dead codepaths in GHC.Debug.Decode.Convert
, and adds support for displaying thread labels in the brick interface.
Edited by Ben Gamari