treewide: yet another restructure

modules, overlays, and packages have their own default.nix re-exporting
things instead of reading file paths. slightly improves declarativeness.

wine-osu is removed; we're just using nix-gaming (for now).

our custom packages will now have to be accessed via pkgs.me instead of
just pkgs. helps know where it came from

future goals: get rid of our overlays completely, or at least not make
it replace anything from nixpkgs

modules/default.nix

@@ -0,0 +1,51 @@
+{ lib }:
+let
+  getName = path: lib.removeSuffix ".nix" ( # Strip extension
+    lib.last (                              # Gets the last part (filename)
+      lib.splitString "/" (                 # Splits the path into components
+        builtins.toString path              # Converts the path into a string
+      )
+    )
+  );
+  mkAttrsFromPaths = paths: builtins.listToAttrs (
+    builtins.map (path: {
+      name = getName path;
+      value = path;
+    }) paths
+  );
+in {
+  system = mkAttrsFromPaths [
+    ./system/audio.nix
+    ./system/base.nix
+    ./system/gui.nix
+    ./system/input.nix
+    ./system/kernel.nix
+    ./system/nix.nix
+    ./system/packages.nix
+    ./system/security.nix
+    ./system/snapper.nix
+    ./system/transmission.nix
+    ./system/wireguard.nix
+  ];
+  user = mkAttrsFromPaths [
+    ./user/bspwm.nix
+    ./user/direnv.nix
+    ./user/dunst.nix
+    ./user/git.nix
+    ./user/gpg.nix
+    ./user/kitty.nix
+    ./user/mpv.nix
+    ./user/neovim.nix
+    ./user/npm.nix
+    ./user/packages-rin.nix
+    ./user/picom.nix
+    ./user/polybar.nix
+    ./user/rofi.nix
+    ./user/sessionVariables.nix
+    ./user/sxhkd.nix
+    ./user/theming.nix
+    ./user/xdg.nix
+    ./user/xorg.nix
+    ./user/zsh.nix
+  ];
+}

modules/system/base.nix

@@ -20,7 +20,6 @@
   };
   nix.registry.config.flake = inputs.self;
   nix.registry.nixpkgs.flake = inputs.nixpkgs;
-  nixpkgs.overlays = overlays;
 
   home-manager = {
     useGlobalPkgs = true;

modules/user/neovim.nix

@@ -45,12 +45,12 @@ in {
       (nvim-treesitter.withPlugins (p: with p; [
         tree-sitter-comment
         tree-sitter-c-sharp
-        pkgs.tree-sitter-glimmer
+        pkgs.me.tree-sitter-glimmer
         tree-sitter-html
         tree-sitter-javascript
         tree-sitter-jsdoc
         tree-sitter-json
-        pkgs.tree-sitter-jsonc
+        pkgs.me.tree-sitter-jsonc
         tree-sitter-lua
         tree-sitter-nix
         tree-sitter-php

modules/user/packages-rin.nix

@@ -32,7 +32,7 @@
         inputs.who-reacted
       ];
       themes = [
-        pkgs.discord-tokyonight
+        pkgs.me.discord-tokyonight
         inputs.radialstatus
         inputs.tokyonight
         inputs.zelk