bahaghari: init flake and devshell

Even if that devshell is not really usable.

subprojects/bahaghari/flake.nix

@@ -0,0 +1,29 @@
+{
+  description = "Specialized set of Nix modules for generating and applying themes.";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = inputs@{ self, nixpkgs, ... }:
+    let systems = inputs.flake-utils.lib.defaultSystems;
+    in inputs.flake-utils.lib.eachSystem systems (system: {
+      devShells.default =
+        import ./shell.nix { pkgs = import nixpkgs { inherit system; }; };
+    }) // {
+      nixosModules = {
+        "bahaghari/tinted-theming" = ./modules/tinted-theming;
+      };
+
+      homeModules = {
+        "bahaghari/tinted-theming" = ./modules/tinted-theming;
+      };
+
+      nixvimModules = {
+        "bahaghari/tinted-theming" = ./modules/tinted-theming;
+      };
+
+      bahaghariLib = ./lib;
+    };
+}

subprojects/bahaghari/shell.nix

@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+with pkgs;
+
+mkShell {
+  inputsFrom = [ nix ];
+}