[nix] Redo and restructure the entire config

Thanks @KaitlynEthylia :)

nix/home/packages.nix

@@ -0,0 +1,93 @@
+{ pkgs, ... }:
+
+let
+  packageSets = with pkgs; {
+   system = [
+      gnutls
+      gsasl
+      libtool
+      patchelf
+      pcre
+      pkg-config
+    ];
+
+    base = [
+      act
+      bat
+      bitwarden-cli
+      cloudflared
+      delta
+      eza
+      ffmpeg
+      fzf
+      gh
+      git-crypt
+      gitui
+      gnupg
+      jq
+      kubectl
+      kubelogin-oidc
+      mosh
+      nixpkgs-fmt
+      pandoc
+      ripgrep
+      sops
+      stylua
+      texlive.combined.scheme-small
+      typst
+      vim
+      wget
+
+      # Fyra
+      glib-networking
+      meson
+      ninja
+      vala
+      desktop-file-utils
+    ];
+
+    languages = [
+      crystal
+      dhall
+      dhall-json
+      dhall-lsp-server
+      go
+      jdk
+      kotlin
+      kotlin-language-server
+      lua-language-server
+      nil
+      nodejs_20
+      python2
+      ruby_3_1
+      sbcl
+      shards
+      zig
+    ];
+
+    programs = [
+      rectangle
+      tailscale
+    ];
+
+    multimedia = [
+      ffmpeg
+    ];
+
+    fonts = [
+      nerdfonts
+      ibm-plex
+    ];
+
+    python = with python311Packages; [
+      colorama
+      psutil
+      distro
+    ];
+  };
+  everything = builtins.concatLists (builtins.attrValues packageSets);
+
+in
+{
+  home.packages = everything;
+}