Align dlv type field with DAP conventions

## Description This PR updates the `dlv` (Delve) adapter's `:type` field from `"debug"` to `"go"` to align with standard DAP conventions. ## Rationale - The VS Code Go extension uses `"type": "go"` in its launch configurations ([source](https://github.com/golang/vscode-go/blob/master/extension/package.json#L554)) - Other adapters in `dape` follow a similar pattern using their language/tool name: - `debugpy` uses `"python"` - `java-debug` uses `"java"` - etc. ## Impact This change is cosmetic and doesn't affect functionality - it simply brings the `dlv` configuration in line with established conventions for better consistency across the codebase. --- Thanks for maintaining `dape` @svaante! It's been a great tool for debugging in Emacs. 🙏