docs: document debugging (#1290)

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## PR Checklist

- [x] Addresses an existing open issue: fixes #1217
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

This PR introduces documentation for debugging

---------

Co-authored-by: Josh Goldberg ✨ <[email protected]>

Author: johnnyreilly

.github/DEVELOPMENT.md

@@ -99,6 +99,19 @@ Add `--watch` to keep the type checker running in a watch mode that updates the
 pnpm tsc --watch
 ```
 
+## Debugging
+
+This repository includes a [VS Code launch configuration](https://code.visualstudio.com/docs/editor/debugging) for debugging.
+Depending upon the type of usage, it can include debugging for unit tests _and_ for executable (or "bin") apps.
+
+### Unit Tests
+
+To debug a unit test, open a test file, then run _Debug Current Test File_ from the VS Code Debug panel (or press F5).
+
+### `bin` Apps
+
+To debug a `bin` app, add a breakpoint to your code, then run _Debug Program_ from the VS Code Debug panel (or press F5).
+
 ## Setup Scripts
 
 As described in the `README.md` file and `docs/`, this template repository comes with three scripts that can set up an existing or new repository.