dev: devenv deprecation

removed devenv in favor for plain nix, implemented using flake-parts

nix/context.nix

@@ -0,0 +1,33 @@
+# Evaluates shared build context once per system for downstream flake-parts modules.
+{
+  inputs,
+  ortVersion,
+  toolchainFile,
+  ...
+}:
+{
+  perSystem =
+    { system, ... }:
+    let
+      pkgs = import inputs.nixpkgs {
+        inherit system;
+        config = {
+          allowUnfree = true;
+          permittedInsecurePackages = [ "minio-2025-10-15T17-29-55Z" ];
+        };
+      };
+    in
+    {
+      _module.args.pkgs = pkgs;
+      _module.args.minneCtx = import ./minne-lib.nix {
+        inherit
+          inputs
+          pkgs
+          system
+          ortVersion
+          toolchainFile
+          ;
+        src = inputs.self;
+      };
+    };
+}