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/windows-sandbox-rs/src/winutil.rs

@@ -0,0 +1,43 @@
+use std::ffi::OsStr;
+use std::os::windows::ffi::OsStrExt;
+use windows_sys::Win32::Foundation::LocalFree;
+use windows_sys::Win32::Foundation::HLOCAL;
+use windows_sys::Win32::System::Diagnostics::Debug::FormatMessageW;
+use windows_sys::Win32::System::Diagnostics::Debug::FORMAT_MESSAGE_ALLOCATE_BUFFER;
+use windows_sys::Win32::System::Diagnostics::Debug::FORMAT_MESSAGE_FROM_SYSTEM;
+use windows_sys::Win32::System::Diagnostics::Debug::FORMAT_MESSAGE_IGNORE_INSERTS;
+
+pub fn to_wide<S: AsRef<OsStr>>(s: S) -> Vec<u16> {
+    let mut v: Vec<u16> = s.as_ref().encode_wide().collect();
+    v.push(0);
+    v
+}
+
+// Produce a readable description for a Win32 error code.
+pub fn format_last_error(err: i32) -> String {
+    unsafe {
+        let mut buf_ptr: *mut u16 = std::ptr::null_mut();
+        let flags = FORMAT_MESSAGE_ALLOCATE_BUFFER
+            | FORMAT_MESSAGE_FROM_SYSTEM
+            | FORMAT_MESSAGE_IGNORE_INSERTS;
+        let len = FormatMessageW(
+            flags,
+            std::ptr::null(),
+            err as u32,
+            0,
+            // FORMAT_MESSAGE_ALLOCATE_BUFFER expects a pointer to receive the allocated buffer.
+            // Cast &mut *mut u16 to *mut u16 as required by windows-sys.
+            (&mut buf_ptr as *mut *mut u16) as *mut u16,
+            0,
+            std::ptr::null_mut(),
+        );
+        if len == 0 || buf_ptr.is_null() {
+            return format!("Win32 error {}", err);
+        }
+        let slice = std::slice::from_raw_parts(buf_ptr, len as usize);
+        let mut s = String::from_utf16_lossy(slice);
+        s = s.trim().to_string();
+        let _ = LocalFree(buf_ptr as HLOCAL);
+        s
+    }
+}