fix: resolver should prioritize prefixed addons/themes again

[AlbertBrand]

Previously the logic for resolving addons and themes was selecting the package that looked like slidev-{type}-{name} or @slidev/{type}-{name} and falling back to {name} if not found, so users can specify xyz to use for instance an addon called slidev-addon-xyz.

But in c53794b this behavior was changed to first check {name} over the others.

I have an extension called slidev-addon-tldraw that is dependent on tldraw. Since that change, the tldraw package is mistakenly loaded as addon, which is a no-op, but breaks the expected addon behavior.

This PR reverts to the old prioritization behavior as I think this is an unwanted regression.

[netlify]

✅ Deploy Preview for slidev ready!

Name	Link
🔨 Latest commit	0697acb
🔍 Latest deploy log	https://app.netlify.com/projects/slidev/deploys/6936d8940a58ca0008cc6b4e
😎 Deploy Preview	https://deploy-preview-2398--slidev.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[pkg-pr-new]

Open in StackBlitz

@slidev/client

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/client@2398

create-slidev

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev@2398

create-slidev-theme

npm i https://pkg.pr.new/slidevjs/slidev/create-slidev-theme@2398

@slidev/parser

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/parser@2398

@slidev/cli

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/cli@2398

@slidev/types

npm i https://pkg.pr.new/slidevjs/slidev/@slidev/types@2398

commit: 0697acb