Phase 5: Configuration & Documentation

Updated all documentation and configuration files:

Documentation changes:
- Updated README.md to describe LLMX as LiteLLM-powered fork
- Updated CLAUDE.md with LiteLLM integration details
- Updated 50+ markdown files across docs/, llmx-rs/, llmx-cli/, sdk/
- Changed all references: codex → llmx, Codex → LLMX
- Updated package references: @openai/codex → @llmx/llmx
- Updated repository URLs: github.com/openai/codex → github.com/valknar/llmx

Configuration changes:
- Updated .github/dependabot.yaml
- Updated .github workflow files
- Updated cliff.toml (changelog configuration)
- Updated Cargo.toml comments

Key branding updates:
- Project description: "coding agent from OpenAI" → "coding agent powered by LiteLLM"
- Added attribution to original OpenAI Codex project
- Documented LiteLLM integration benefits

Files changed: 51 files (559 insertions, 559 deletions)

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

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

llmx-rs/responses-api-proxy/npm/README.md

@@ -1,13 +1,13 @@
-# @openai/codex-responses-api-proxy
+# @llmx/llmx-responses-api-proxy
 
-<p align="center"><code>npm i -g @openai/codex-responses-api-proxy</code> to install <code>codex-responses-api-proxy</code></p>
+<p align="center"><code>npm i -g @llmx/llmx-responses-api-proxy</code> to install <code>llmx-responses-api-proxy</code></p>
 
-This package distributes the prebuilt [Codex Responses API proxy binary](https://github.com/openai/codex/tree/main/codex-rs/responses-api-proxy) for macOS, Linux, and Windows.
+This package distributes the prebuilt [LLMX Responses API proxy binary](https://github.com/valknar/llmx/tree/main/llmx-rs/responses-api-proxy) for macOS, Linux, and Windows.
 
 To see available options, run:
 
 ```
-node ./bin/codex-responses-api-proxy.js --help
+node ./bin/llmx-responses-api-proxy.js --help
 ```
 
-Refer to [`codex-rs/responses-api-proxy/README.md`](https://github.com/openai/codex/blob/main/codex-rs/responses-api-proxy/README.md) for detailed documentation.
+Refer to [`llmx-rs/responses-api-proxy/README.md`](https://github.com/valknar/llmx/blob/main/llmx-rs/responses-api-proxy/README.md) for detailed documentation.