quickfort: remove dead code for retired query/config modes

[Alistair-Afton]

Fixes DFHack/dfhack#5755

Summary

• The query and config blueprint modes were retired in the v50 quickfort rewrite: parse_modeline() maps their modelines to ignore, so query.lua, config.lua, aliases.lua, and keycodes.lua have been unreachable ever since.
• aliases.lua still referenced data/quickfort/aliases-common.txt, which was deleted during the data directory restructure and is not part of the install set. This removes the dangling reference along with the rest of the dead code.
• Also updated the dormant test/quickfort unit tests that still exercised the removed modules and settings (query_unsafe, read_settings, etc. no longer exist), and fixed list_integration expectations for the retired modelines.
• Per-blueprint #aliases sections and ctx.aliases are unaffected — that machinery lives in parse.lua/list.lua and is still used by dig/build/place/zone/burrow/meta/notes.

Testing

• Loaded quickfort and ran quickfort list and apply_blueprint in-game to verify nothing in the live path touches the removed modules.
• If query mode ever needs to come back, the removed modules are recoverable from git history.