feat: introduced new home-manager features

Changed wallpaper to better fit the style of the WM
- affected common variables
- affected hyprland configuration
- affected stylix configuration
- included additional flake inputs
Added Spicetify packages (not working)
Added obs-studio home-manager program option
Added vimkey navigation keybinds for Hyprland

home-manager/stvnliu/scripts/default.nix

@@ -0,0 +1,7 @@
+{
+  config,
+  pkgs,
+  ...
+}: {
+  home.packages = [(import ./heic-to-jpg.script.nix {inherit pkgs;})];
+}