Initial restructure of flake.nix

- Added nixpkgs-unstable input
- Added disko input
- Made nixosSystem & darwinSystem reusable with parameters
- Switched darwinConfigurations to use parameterized darwinSystem
- Switched nixosConfigurations to use parameterized darwinSystem

flake.lock

@@ -17,6 +17,26 @@
         "type": "github"
       }
     },
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1702569759,
+        "narHash": "sha256-Ze3AdEEsVZBRJ4wn13EZpV1Uubkzi59TkC4j2G9xoFI=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "98ab91109716871f50ea8cb0e0ac7cc1e1e14714",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -143,6 +163,22 @@
         "type": "indirect"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1702539185,
+        "narHash": "sha256-KnIRG5NMdLIpEkZTnN5zovNYc0hhXjAgv6pfd5Z4c7U=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "aa9d4729cbc99dabacb50e3994dcefb3ea0f7447",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1688049487,
@@ -176,11 +212,13 @@
     },
     "root": {
       "inputs": {
+        "disko": "disko",
         "genebean-omp-themes": "genebean-omp-themes",
         "home-manager": "home-manager",
         "nix-darwin": "nix-darwin",
         "nix-homebrew": "nix-homebrew",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_3",
+        "nixpkgs-unstable": "nixpkgs-unstable"
       }
     },
     "systems": {