[mac] Adds rust devel. [nvim] Uses snacks for buffer picker

home-manager/features/development/macos.nix

@@ -0,0 +1,15 @@
+
+# Meta-package for development on linux
+{ lib, ... }:
+{
+  imports = [
+    ./development.nix
+  ];
+
+  # OS X seems to render these fonts a bit smaller than Linux
+  programs.alacritty.settings.font.size = lib.mkForce 14;
+
+  # OS X doesn't support configuring the ssh-agent
+  services.ssh-agent.enable = lib.mkForce false;
+
+}

home-manager/features/development/rust.nix

@@ -0,0 +1,7 @@
+{ pkgs, ...}:
+{
+  home.packages = with pkgs; [
+    rust-analyzer
+    rustfmt
+  ];
+}