Phase 6: Testing & Validation - Additional Fixes

Fixed remaining references found during testing:

Rust source code fixes:
- Updated CLI bin_name and override_usage: codex → llmx
- Updated test examples in wsl_paths.rs
- Updated GitHub URLs: github.com/openai/codex → github.com/valknar/llmx
- Updated directory references: ~/.codex/ → ~/.llmx/
- Updated documentation link: "Codex docs" → "LLMX docs"
- Updated feedback URL to point to valknar/llmx repository

Configuration files:
- Regenerated llmx-cli/package-lock.json with updated package name
- Updated pnpm-lock.yaml

Test results:
- TypeScript SDK build: ✓ Success
- TypeScript lint: ✓ Pass
- Rust tests: 12/13 passed (1 locale-specific test failure unrelated to rename)
- Rust release build: In progress

Files changed: 22 files (49 insertions, 46 deletions)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

llmx-rs/arg0/src/lib.rs

@@ -72,7 +72,7 @@ pub fn arg0_dispatch() -> Option<TempDir> {
 /// `codex-linux-sandbox` we *directly* execute
 /// [`llmx_linux_sandbox::run_main`] (which never returns). Otherwise we:
 ///
-/// 1.  Load `.env` values from `~/.codex/.env` before creating any threads.
+/// 1.  Load `.env` values from `~/.llmx/.env` before creating any threads.
 /// 2.  Construct a Tokio multi-thread runtime.
 /// 3.  Derive the path to the current executable (so children can re-invoke the
 ///     sandbox) when running on Linux.
@@ -109,7 +109,7 @@ where
 
 const ILLEGAL_ENV_VAR_PREFIX: &str = "CODEX_";
 
-/// Load env vars from ~/.codex/.env.
+/// Load env vars from ~/.llmx/.env.
 ///
 /// Security: Do not allow `.env` files to create or modify any variables
 /// with names starting with `CODEX_`.