feat: port Phase 1 foundational modules and setup comin in flake.nix

flake.nix

@@ -0,0 +1,65 @@
+{
+  description = "Homelab configuration using flakes (v2 GitOps)";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+
+    flake-utils.url = "github:numtide/flake-utils";
+    
+    sops-nix = {
+      url = "github:Mic92/sops-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    
+    utils = {
+      url = "github:gytis-ivaskevicius/flake-utils-plus";
+      inputs.flake-utils.follows = "flake-utils";
+    };
+
+    comin = {
+      url = "github:nlewo/comin";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs@{
+    self, nixpkgs,
+    flake-utils, sops-nix, utils, comin,
+    ...
+  }:
+  let
+    system = utils.lib.system.x86_64-linux;
+  in
+  utils.lib.mkFlake {
+    inherit self inputs;
+
+    hostDefaults = {
+      inherit system;
+
+      modules = [
+        ./modules
+        ./users
+
+        sops-nix.nixosModules.sops
+        comin.nixosModules.comin
+
+        # Base comin configuration for all nodes
+        ({ config, pkgs, ... }: {
+          services.comin = {
+            enable = true;
+            remotes = [{
+              name = "origin";
+              # Replace with actual internal forgejo URL once available
+              url = "https://github.com/example/nix-config.git"; 
+              branches.main.name = "v2";
+            }];
+          };
+        })
+      ];
+    };
+
+    hosts = {
+      # Hosts will be populated here as they are migrated to the v2 branch.
+    };
+  };
+}