### Context This PR adds documentation for setting up GitHub Copilot Enterprise as an edit prediction provider in Zed. There was previously no documentation for this feature, which was implemented in [PR #32296](https://github.com/zed-industries/zed/pull/32296). This follows up on [my comment](https://github.com/zed-industries/zed/issues/22901#issuecomment-3034817471) and the response from the[ Zed team](https://github.com/zed-industries/zed/issues/22901#issuecomment-3034837282), which clarified the required settings. ### What’s included - Documents the `enterprise_uri` setting for Copilot Enterprise in `edit-prediction.md`. - Explains how to configure the setting and what to expect from the sign-in flow. ### Notes - This is a documentation-only change. - No code or tests are affected. Release Notes: - N/A --------- Co-authored-by: Peter Tripp <peter@zed.dev>