Split several monolithic files to reduce transitive dependencies and
enable the dun_render_benchmark to link without bringing in all of
DevilutionX:
- Extract dungeon tile globals and loading functions from `gendung` into
`dun_tile_data.{hpp,cpp}`
- Extract light table data and MakeLightTable from lighting into
`engine/light_tables.{hpp,cpp}`
- Move cursor_id and SelectionRegion to cursor_defs.hpp
- Extract quest log rendering to `panels/quest_log.{hpp,cpp}`
- Extract drlg quest setpiece logic to `levels/drlg_quests.{hpp,cpp}`
- Extract quest data loading to `tables/questdat.{hpp,cpp}`
- Move `GameData` and `gbIsMultiplayer` into `game_mode.{hpp,cpp}`
- Add `parse_sfx_id.{hpp,cpp}`
- Update CMake libraries accordingly
Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
