Should not process sub hydrate-components when rendering a component

[eight]

elderjs/src/utils/svelteComponent.ts

Line 39 in 6d2cd15

 const innerHtml = mountComponentsInHtml({ 

When rendering a component, sub hydrate-components are collected and added to the current page. Ideally, they should be processed after the entire HTML page is built. With the current code:

1. The page may include a hydrated component which is actually not on the page. For example, when Layout.svelte doesn't output templateHtml.
2. mountComponentsInHtml is applied to the same string multiple times.