docs(telemetry): relocate telemetry documentation (#1327)

Moves the telemetry.md file from docs/core to the top-level docs/ directory to make it more discoverable.

Updates the link in the main index.md and removes the old reference from the CLI configuration page.

docs/cli/configuration.md

@@ -30,7 +30,6 @@ Gemini CLI uses `settings.json` files for persistent configuration. There are tw
 In addition to a project settings file, a project's `.gemini` directory can contain other project-specific files related to Gemini CLI's operation, such as:
 
 - [Custom sandbox profiles](#sandboxing) (e.g., `.gemini/sandbox-macos-custom.sb`, `.gemini/sandbox.Dockerfile`).
-- [Telemtry configurations](../core/telemetry.md#running-an-otel-collector) (e.g., `.gemini/otel/`).
 
 ### Available settings in `settings.json`:
 

docs/index.md

@@ -17,6 +17,7 @@ This documentation is organized into the following sections:
   - **[Commands](./cli/commands.md):** Description of available CLI commands.
   - **[Configuration](./cli/configuration.md):** Information on configuring the CLI.
   - **[Extensions](./extension.md):** How to extend the CLI with new functionality.
+  - **[Telemetry](./telemetry.md):** Overview of telemetry in the CLI.
 - **Core Details:** Documentation for `packages/core`.
   - **[Core Introduction](./core/index.md):** Overview of the core component.
   - **[Configuration](./core/configuration.md):** Information on configuring the core component.