docs: add winget install command (#1918)

## Summary
- Add the `winget install MoeruAI.AIRI` command to the root README
Windows install tip.
- Mirror the same winget command in the localized README files covered
by the issue.

Closes #1913

## Validation
- `grep -n -B 5 -A 5 "MoeruAI\.AIRI" README.md docs/README.*.md`
- `git diff --check`

docs/README.ru-RU.md

@@ -135,7 +135,13 @@
 > Сильно вдохновлено [Neuro-sama](https://www.youtube.com/@Neurosama)
 
 > [!TIP]
-> В Windows AIRI также можно установить с помощью [Scoop](https://scoop.sh/):
+> В Windows AIRI можно установить с помощью [winget](https://learn.microsoft.com/windows/package-manager/winget/):
+>
+> ```powershell
+> winget install MoeruAI.AIRI
+> ```
+>
+> Или установить AIRI через [Scoop](https://scoop.sh/):
 >
 > ```powershell
 > scoop bucket add airi https://github.com/moeru-ai/airi