Adapted hyprland configurations for new breaking changes, and some misc adjustments

adjusted hyprland config for new breaking changes

capitalized 'Description' keys in userservices

altered shell aliases and added missing autosuggest option in zsh/options.nix

rebuild now has dry run flags

added hyprpaper to packages.nix

updated check_updates service to check the upstream nixpkgs channel instead of my local flake pkgs

modules/home/environment/hyprland.nix

@@ -125,7 +125,6 @@ in {
         };
 
         dwindle = {
-          no_gaps_when_only = false;
           force_split = 0;
           special_scale_factor = 1.0;
           split_width_multiplier = 1.0;
@@ -137,7 +136,6 @@ in {
         master = {
           new_status = "master";
           special_scale_factor = 1;
-          no_gaps_when_only = false;
         };
 
         decoration = {
@@ -158,12 +156,6 @@ in {
             xray = true;
           };
 
-          drop_shadow = true;
-
-          shadow_ignore_window = true;
-          shadow_offset = "0 2";
-          shadow_range = 20;
-          shadow_render_power = 3;
         };
 
         animations = {