Phase 1: Repository & Infrastructure Setup

- Renamed directories: codex-rs -> llmx-rs, codex-cli -> llmx-cli
- Updated package.json files:
  - Root: llmx-monorepo
  - CLI: @llmx/llmx
  - SDK: @llmx/llmx-sdk
- Updated pnpm workspace configuration
- Renamed binary: codex.js -> llmx.js
- Updated environment variables: CODEX_* -> LLMX_*
- Changed repository URLs to valknar/llmx

🤖 Generated with Claude Code

llmx-rs/default.nix

@@ -0,0 +1,32 @@
+{
+  openssl,
+  rustPlatform,
+  pkg-config,
+  lib,
+  ...
+}:
+rustPlatform.buildRustPackage (_: {
+  env = {
+    PKG_CONFIG_PATH = "${openssl.dev}/lib/pkgconfig:$PKG_CONFIG_PATH";
+  };
+  pname = "codex-rs";
+  version = "0.1.0";
+  cargoLock.lockFile = ./Cargo.lock;
+  doCheck = false;
+  src = ./.;
+  nativeBuildInputs = [
+    pkg-config
+    openssl
+  ];
+
+  cargoLock.outputHashes = {
+    "ratatui-0.29.0" = "sha256-HBvT5c8GsiCxMffNjJGLmHnvG77A6cqEL+1ARurBXho=";
+    "crossterm-0.28.1" = "sha256-6qCtfSMuXACKFb9ATID39XyFDIEMFDmbx6SSmNe+728=";
+  };
+
+  meta = with lib; {
+    description = "OpenAI Codex command‑line interface rust implementation";
+    license = licenses.asl20;
+    homepage = "https://github.com/openai/codex";
+  };
+})