WIP: Integration branch with darwin and deck support

- Added darwin and jovian inputs
- Added platform-specific package configurations
- Added darwinConfigurations and deck nixosConfiguration
- Copied darwin and deck specific files
- Fixed darwin version compatibility

Some configurations still need debugging

modules/darwin/secrets.nix

@@ -0,0 +1,47 @@
+{ config, pkgs, agenix, secrets, ... }:
+
+let user = "dustin"; in
+{
+  age = { 
+    identityPaths = [ 
+      "/Users/${user}/.ssh/id_ed25519"
+    ];
+
+    secrets = { 
+      "syncthing-cert" = {
+        symlink = true;
+        path = "/Users/${user}/Library/Application Support/Syncthing/cert.pem";
+        file =  "${secrets}/darwin-syncthing-cert.age";
+        mode = "644";
+        owner = "${user}";
+        group = "staff";
+      };
+
+      "syncthing-key" = {
+        symlink = true;
+        path = "/Users/${user}/Library/Application Support/Syncthing/key.pem";
+        file =  "${secrets}/darwin-syncthing-key.age";
+        mode = "600";
+        owner = "${user}";
+        group = "staff";
+      };
+
+      "github-ssh-key" = {
+        symlink = true;
+        path = "/Users/${user}/.ssh/id_github";
+        file =  "${secrets}/github-ssh-key.age";
+        mode = "600";
+        owner = "${user}";
+        group = "staff";
+      };
+
+      "github-signing-key" = {
+        symlink = false;
+        path = "/Users/${user}/.ssh/pgp_github.key";
+        file =  "${secrets}/github-signing-key.age";
+        mode = "600";
+        owner = "${user}";
+      };
+    };
+  };
+}