Dev setup: winget install commands for the Windows toolchain

Add a winget block to the prerequisites (Git/Python/Node/VS Code/MySQL
or Docker) so a Windows dev provisions the whole toolchain from one
terminal, with a note that the LTS Node may be newer than CI's 20 and
it does not matter for this SPA (nvm-windows to pin if wanted).

docs/DEVELOPMENT-SETUP.md

@@ -28,6 +28,21 @@ sane, then use manual for day-to-day work.
 | MySQL | 8.0 (or Docker, below) | `mysql --version` |
 | Git | any recent | `git --version` |
 
+On Windows, install all of them with winget (accept each license, then
+reopen the terminal so PATH updates):
+
+```powershell
+winget install Git.Git                    # includes Git Bash (naming hook needs it)
+winget install Python.Python.3.12
+winget install OpenJS.NodeJS.LTS          # LTS; may install v24, fine for this SPA
+winget install Microsoft.VisualStudioCode
+winget install Oracle.MySQL               # or Docker.DockerDesktop for the DB
+```
+
+CI runs Node 20; the LTS package may be newer. This Vite/Vue frontend builds
+identically across 20-24, so it does not matter. To pin exactly:
+`winget install CoreyButler.NVMforWindows` then `nvm install 20; nvm use 20`.
+
 ---
 
 ## 1. Get the code