chore: move toml helpers into overlay

configs/default.nix

@@ -95,6 +95,7 @@ in {
     }
     {
       nixpkgs = {
+        overlays = [ (import <niveum/overlays/toml.nix>) ];
         config = {
           allowUnfree = true;
           packageOverrides = pkgs: {

configs/i3.nix

@@ -29,9 +29,6 @@ let
     };
   };
 
-  myLib = import <niveum/lib> { inherit pkgs; };
-  inherit (myLib) writeTOML;
-
   new-workspace = pkgs.unstable.writers.writeDash "new-workspace" ''
     i3-msg workspace $(($(i3-msg -t get_workspaces | tr , '\n' | grep '"num":' | cut -d : -f 2 | sort -rn | head -1) + 1))
   '';
@@ -150,7 +147,7 @@ in with config.niveum; {
           };
         };
         statusCommand = "${pkgs.unstable.i3status-rust}/bin/i3status-rs ${
-            writeTOML (import <niveum/dot/i3status-rust.nix> {
+            pkgs.writeTOML (import <niveum/dot/i3status-rust.nix> {
               wifi-interface = networkInterfaces.wireless;
               batteryBlock = batteryBlocks.default;
               inherit (config.niveum) colours;

configs/spotify.nix

@@ -1,6 +1,5 @@
 { pkgs, lib, ... }:
 let
-  inherit (import <niveum/lib> { inherit pkgs; }) toTOML;
   inherit (lib.strings) fileContents;
 in {
   environment.systemPackages = with pkgs; [ spotify spotify-tui playerctl ];