refactor: complete overhaul

Complete overhaul of repo structure based on nvix.

See https://github.com/niksingh710/nvix

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

modules/flake/default.nix

@@ -0,0 +1,23 @@
+{ inputs, self, ... }:
+{
+  debug = true;
+
+  imports = [ ./devshell.nix ];
+
+  perSystem =
+    { lib, system, ... }:
+    {
+      _module.args = {
+        flake = { inherit inputs self; };
+        pkgs = import inputs.nixpkgs {
+          inherit system;
+          overlays = lib.attrValues self.overlays;
+          config.allowUnfree = true;
+        };
+      };
+
+      imports = [
+        (self + /packages)
+      ];
+    };
+}