build.zig scans module addon/ and assets/ directories, passes file
lists as build options. main.zig uses comptime helpers to @embedFile
each path and build the AddonPrefix table automatically. Adding or
removing files no longer requires editing main.zig.
Also renames markers addon files to match WoW addon name
(Markers.toc → WorldMarkers.toc, Markers.lua → WorldMarkers.lua)
and auto-generates loadAddonsDetour from the same module metadata.
