home: create 'modules/home' folder

Consolidating all modules under the same path, to clear out the
top-level directory.

modules/home/secrets/default.nix

@@ -0,0 +1,25 @@
+{ config, inputs, lib, options, ... }:
+
+{
+  imports = [
+    inputs.agenix.homeManagerModules.age
+  ];
+
+  config.age = {
+    secrets =
+      let
+        toName = lib.removeSuffix ".age";
+        toSecret = name: { ... }: {
+          file = ./. + "/${name}";
+        };
+        convertSecrets = n: v: lib.nameValuePair (toName n) (toSecret n v);
+        secrets = import ./secrets.nix;
+      in
+      lib.mapAttrs' convertSecrets secrets;
+
+    # Add my usual agenix key to the defaults
+    identityPaths = options.age.identityPaths.default ++ [
+      "${config.home.homeDirectory}/.ssh/agenix"
+    ];
+  };
+}

modules/home/secrets/secrets.nix

@@ -0,0 +1,9 @@
+# Common secrets
+let
+  keys = import ../../keys;
+
+  all = builtins.attrValues keys.users;
+in
+{
+  "github/token.age".publicKeys = all;
+}