home: refactor common files

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

home/common/emacs/default.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, inputs, lib, ... }:
+let
+  emacs = pkgs.emacs-git-pgtk;
+  configFile = ./config/emacs/config.org;
+  enable = true;
+in
+{
+  nixpkgs.overlays = [ inputs.emacs-overlay.overlays.default ];
+
+  home = {
+    shellAliases = rec {
+      e = "emacs";
+      enw = e + " -nw";
+      ec = "emacsclient";
+      ecc = ec + " -c";
+      ecnw = ec + " -nw";
+    };
+  };
+  programs.emacs = {
+    inherit enable;
+    package = pkgs.emacsWithPackagesFromUsePackage {
+      config = configFile;
+      package = emacs;
+      alwaysEnsure = true;
+      alwaysTangle = true;
+      defaultInitFile = true;
+      extraEmacsPackages = epkgs: with epkgs; [
+        use-package
+        (tree-sitter-langs.withPlugins (_: tree-sitter-langs.plugins))
+      ];
+    };
+  };
+  services.emacs = {
+    inherit enable;
+    defaultEditor = true;
+  };
+  systemd.user.services.emacs.Service.Environment = "COLORTERM=truecolor";
+}