fix problems rebuilding, make niri and noctalia more HM friendly

added `inputs` to `extraSpecialArgs`, giving homeModules access to helper functions
cleaned up the logic for the stylix file, removing the final `sharedModules` in the process in favour of `home-manager.users.grey`

dotfiles/kitagawa/noctalia/settings.toml

@@ -4,8 +4,9 @@ config_version = 13
 enable_sounds = true
 
 [backdrop]
-blur_intensity = 0.099999997764825821
-tint_intensity = 0.14999999664723873
+blur_intensity = 0.74999998323619366
+enabled = true
+tint_intensity = 0.19999999552965164
 
 [bar.default]
 background_opacity = 0.79999998211860657