Implement reference lock file approach instead of flattening inputs

- Reverted main flake.nix to original clean state with blank follows
- Created src/local/flake.lock and src/tests/flake.lock with reference inputs
- Updated .gitignore to track specific lock files
- Avoids lock file bloat while maintaining Nix 2.18+ compatibility

Co-authored-by: blaggacao <[email protected]>

Author: Copilot

.gitignore

@@ -5,6 +5,8 @@
 
 .std
 /**/flake.lock
+!src/local/flake.lock
+!src/tests/flake.lock
 result
 
 # prj-spec dirs

flake.nix

@@ -4,65 +4,49 @@
 # SPDX-License-Identifier: Unlicense
 {
   description = "The Nix Flakes framework for perfectionists with deadlines";
-  
+  # override downstream with inputs.std.inputs.nixpkgs.follows = ...
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/release-23.11";
+  inputs.lib.url = "github:nix-community/nixpkgs.lib";
   inputs = {
-    # Core dependencies
-    nixpkgs.url = "github:nixos/nixpkgs/release-23.11";  # override downstream with inputs.std.inputs.nixpkgs.follows = ...
-    lib.url = "github:nix-community/nixpkgs.lib";
-    
-    # Framework dependencies
     paisano.url = "github:paisano-nix/core/0.2.0";
     paisano.inputs.nixpkgs.follows = "nixpkgs";
     paisano.inputs.yants.follows = "yants";
     paisano-tui = {
       url = "github:paisano-nix/tui/v0.5.0";
       flake = false; # we're after the source code, only
     };
-    
-    blank.url = "github:divnix/blank";
-    yants = {
-      url = "github:divnix/yants";
-      inputs.nixpkgs.follows = "lib";
-    };
-    dmerge = {
-      url = "github:divnix/dmerge/0.2.1";
-      inputs.haumea.follows = "haumea";
-      inputs.yants.follows = "yants";
-      inputs.nixlib.follows = "lib";
-    };
-    haumea = {
-      url = "github:nix-community/haumea/v0.2.2";
-      inputs.nixpkgs.follows = "lib";
-    };
-    incl = {
-      url = "github:divnix/incl";
-      inputs.nixlib.follows = "lib";
-    };
-    
-    # Development tools (previously "blank" and injected via sub-flakes, now included directly
-    # to avoid self-referential sub-flake issues with Nix 2.18+)
-    devshell.url = "github:numtide/devshell";
-    devshell.inputs.nixpkgs.follows = "nixpkgs";
-    
-    nixago.url = "github:nix-community/nixago";
-    nixago.inputs.nixpkgs.follows = "nixpkgs";
-    nixago.inputs.nixago-exts.follows = "blank";
-    
-    n2c.url = "github:nlewo/nix2container";
-    n2c.inputs.nixpkgs.follows = "nixpkgs";
-    
-    # Testing and infrastructure tools
-    namaka.url = "github:nix-community/namaka/v0.2.0";
-    namaka.inputs.haumea.follows = "haumea";
-    namaka.inputs.nixpkgs.follows = "nixpkgs";
-    
-    # Additional tools (keep as blank for now, can be enabled if needed)
-    terranix.follows = "blank";
-    microvm.follows = "blank";
-    makes.follows = "blank";
-    arion.follows = "blank";
-    flake-parts.follows = "blank";
   };
+  };
+  inputs.blank.url = "github:divnix/blank";
+  inputs.yants = {
+    url = "github:divnix/yants";
+    inputs.nixpkgs.follows = "lib";
+  };
+  inputs.dmerge = {
+    url = "github:divnix/dmerge/0.2.1";
+    inputs.haumea.follows = "haumea";
+    inputs.yants.follows = "yants";
+    inputs.nixlib.follows = "lib";
+  };
+  inputs.haumea = {
+    url = "github:nix-community/haumea/v0.2.2";
+    inputs.nixpkgs.follows = "lib";
+  };
+  inputs.incl = {
+    url = "github:divnix/incl";
+    inputs.nixlib.follows = "lib";
+  };
+  /*
+  Auxiliar inputs used in builtin libraries or for the dev environment.
+  */
+  inputs.n2c.follows = "blank";
+  inputs.devshell.follows = "blank";
+  inputs.nixago.follows = "blank";
+  inputs.terranix.follows = "blank";
+  inputs.microvm.follows = "blank";
+  inputs.makes.follows = "blank";
+  inputs.arion.follows = "blank";
+  inputs.flake-parts.follows = "blank";
 
   outputs = inputs: let
     # bootstrap std