refactor(runtime-vapor): template fragment

[LittleSound]

The existing template runtime function has some issues when using the DocumentFragment API. This PR aims to solve these problems through refactoring.

related info：whatwg/dom#736

[netlify]

✅ Deploy Preview for vapor-repl ready!

Name	Link
🔨 Latest commit	8ef4013
🔍 Latest deploy log	https://app.netlify.com/sites/vapor-repl/deploys/65b806c1eb85140008ee88e2
😎 Deploy Preview	https://deploy-preview-100--vapor-repl.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 site configuration.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
compiler-dom.global.prod.js	79.7 kB	28 kB	24.6 kB
compiler-vapor.global.prod.js	43.5 kB	14.5 kB	13.2 kB
runtime-dom.global.prod.js	91.1 kB	34.7 kB	31.2 kB
runtime-vapor.global.prod.js	29.2 kB (-294 B)	11.4 kB (-32 B)	10.4 kB (-29 B)
vue-vapor.global.prod.js	70.4 kB (-294 B)	24.6 kB (-14 B)	22.3 kB (+3 B)
vue.global.prod.js	148 kB	53.9 kB	48 kB

Usages

Name	Size	Gzip	Brotli
createApp	51.4 kB	20 kB	18.3 kB
createSSRApp	54.7 kB	21.3 kB	19.4 kB
defineCustomElement	53.7 kB	20.8 kB	19 kB
vapor	29.4 kB (-294 B)	11.4 kB (-28 B)	10.5 kB (-32 B)
overall	65.1 kB	25.1 kB	22.7 kB