feat(accounts): add Fastmail configuration with Himalaya support

home/programs/default.nix

@@ -35,6 +35,7 @@
     ./yt-dlp.nix
     ./zoxide.nix
     ./television.nix
+    ./himalaya.nix
 
     # ./goread.nix
     # ./helix.nix

home/programs/himalaya.nix

@@ -0,0 +1,13 @@
+{device, ...}: {
+  programs.himalaya = {
+    enable = true;
+  };
+  accounts.email.accounts.fastmail.himalaya = {
+    enable = true;
+    settings = {
+      downloads-dir = "${device.home}/Mail";
+      backend.type = "maildir";
+      backend.root-dir = "~/Mail";
+    };
+  };
+}