chore: Remove OpenAI branding and references

Update project branding to reflect community fork status:

- Changed welcome message from "OpenAI's command-line coding agent"
  to "your command-line coding agent"
- Updated system prompt from "led by OpenAI" to "community project"
- Removed broken developers.openai.com/llmx documentation URLs
- Updated Windows setup instructions with correct npm package name
- Removed OpenAI CLA (not applicable to community fork)
- Removed OpenAI open source fund documentation
- Updated config docs to remove managed configuration references
- Changed npm package reference from @openai/llmx to @valknarthing/llmx

These changes complete the rebranding from OpenAI's project to an
independent community fork while maintaining proper attribution to
the original project in README.md.

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

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

docs/CLA.md

@@ -1,49 +0,0 @@
-# Individual Contributor License Agreement (v1.0, OpenAI)
-
-_Based on the Apache Software Foundation Individual CLA v 2.2._
-
-By commenting **“I have read the CLA Document and I hereby sign the CLA”**
-on a Pull Request, **you (“Contributor”) agree to the following terms** for any
-past and future “Contributions” submitted to the **OpenAI LLMX CLI project
-(the “Project”)**.
-
----
-
-## 1. Definitions
-
-- **“Contribution”** – any original work of authorship submitted to the Project
-  (code, documentation, designs, etc.).
-- **“You” / “Your”** – the individual (or legal entity) posting the acceptance
-  comment.
-
-## 2. Copyright License
-
-You grant **OpenAI, Inc.** and all recipients of software distributed by the
-Project a perpetual, worldwide, non‑exclusive, royalty‑free, irrevocable
-license to reproduce, prepare derivative works of, publicly display, publicly
-perform, sublicense, and distribute Your Contributions and derivative works.
-
-## 3. Patent License
-
-You grant **OpenAI, Inc.** and all recipients of the Project a perpetual,
-worldwide, non‑exclusive, royalty‑free, irrevocable (except as below) patent
-license to make, have made, use, sell, offer to sell, import, and otherwise
-transfer Your Contributions alone or in combination with the Project.
-
-If any entity brings patent litigation alleging that the Project or a
-Contribution infringes a patent, the patent licenses granted by You to that
-entity under this CLA terminate.
-
-## 4. Representations
-
-1. You are legally entitled to grant the licenses above.
-2. Each Contribution is either Your original creation or You have authority to
-   submit it under this CLA.
-3. Your Contributions are provided **“AS IS”** without warranties of any kind.
-4. You will notify the Project if any statement above becomes inaccurate.
-
-## 5. Miscellany
-
-This Agreement is governed by the laws of the **State of California**, USA,
-excluding its conflict‑of‑laws rules. If any provision is held unenforceable,
-the remaining provisions remain in force.

docs/config.md

@@ -873,7 +873,7 @@ notifications = [ "agent-turn-complete", "approval-requested" ]
 
 ### Forcing a login method
 
-To force users on a given machine to use a specific login method or workspace, use a combination of [managed configurations](https://developers.openai.com/llmx/security#managed-configuration) as well as either or both of the following fields:
+To force users on a given machine to use a specific login method or workspace, use either or both of the following fields in your configuration:
 
 ```toml
 # Force the user to log in with ChatGPT or via an api key.

docs/open-source-fund.md

@@ -1,8 +0,0 @@
-## LLMX open source fund
-
-We're excited to launch a **$1 million initiative** supporting open source projects that use LLMX CLI and other OpenAI models.
-
-- Grants are awarded up to **$25,000** API credits.
-- Applications are reviewed **on a rolling basis**.
-
-**Interested? [Apply here](https://openai.com/form/llmx-open-source-fund/).**