alacritty: add configuration

Add the whole file rather than adding it via Home Manager as that causes
a conflict with Pop!_OS where Alacritty is installed via Flatpak rather
than via Nix/Home Manager.

This may be something to try again in future.

config/alacritty/alacritty.yml

@@ -0,0 +1,23 @@
+{
+  "font": {
+    "glyph_offset": {
+      "y": 6
+    },
+    "normal": {
+      "family": "JetBrains Mono NL"
+    },
+    "offset": {
+      "y": 12
+    },
+    "size": 12
+  },
+  "shell": {
+    "program": "zsh"
+  },
+  "window": {
+    "padding": {
+      "x": 15,
+      "y": 15
+    }
+  }
+}

home-manager/modules/common.nix

@@ -235,6 +235,11 @@ in {
     "$HOME/.config/bin"
   ];
 
+  xdg.configFile.alacritty = {
+    source = ../../config/alacritty;
+    recursive = true;
+  };
+
   xdg.configFile.bin = {
     source = ../../bin;
     recursive = true;