Fix machine-generated Hyprland config never loading

Lua's require() treats dots in the module string as directory
separators, so pcall(require, "conf.d.autostart") resolved to
conf/d/autostart.lua instead of the real conf.d/autostart.lua. The
failure was silently swallowed by pcall, so autostart/locale/nvidia/
terminal configs never took effect on any machine using this repo.
Renamed the generated directory to confd (no dot) and updated the
require calls to match.

packages/hyprland/.config/hypr/hyprland.lua

@@ -11,7 +11,7 @@ hl.config({
 })
 
 -- machine-generated by src/install.ts based on chosen packages/detected hardware/locale
-pcall(require, "conf.d.autostart")
-pcall(require, "conf.d.locale")
-pcall(require, "conf.d.nvidia")
-pcall(require, "conf.d.terminal")
+pcall(require, "confd.autostart")
+pcall(require, "confd.locale")
+pcall(require, "confd.nvidia")
+pcall(require, "confd.terminal")