Slot content projection doesn't load mdx components

[adamdbradley]

In the docs site, when the Layout components wraps a content component (built from mdx), the content does render, but if the content has a child component it doesn't render.

Main component: https://github.com/BuilderIO/qwik/blob/844a1b2c03bdb685dfb4e11cc7e48c83e1e170a1/docs/site/src/main.tsx#L18-L20

Layout component w/ Slot:
https://github.com/BuilderIO/qwik/blob/844a1b2c03bdb685dfb4e11cc7e48c83e1e170a1/docs/site/src/layouts/docs/docs.tsx#L25

The bootstrap.mdx file has a <Counter/> component: https://github.com/BuilderIO/qwik/blob/844a1b2c03bdb685dfb4e11cc7e48c83e1e170a1/docs/guide/bootstrap.mdx

The counter component works when not using slot and wiring up the bootstrap component directly.

[mhevery]

Add this to render.unit.ts

    it.only('should render nested component when it is projected by parent', async () => {
      const Layout = component$(
        () => {
          return $(() => (
            <div>
              <Slot />
            </div>
          ));
        },
        { tagName: 'layout' }
      );
      const Content = component$(
        () => {
          return $(() => (
            <span>
              <Slot />
            </span>
          ));
        },
        { tagName: `content` }
      );
      await render(
        fixture.host,
        <Layout>
          <Content>projection</Content>
        </Layout>
      );
      console.log(prettyHtml(fixture.host));
      expectRendered(
        <layout>
          <template />
          <div>
            <q:slot>
              <content>
                <template />
                <span>
                  <q:slot>projection</q:slot>
                </span>
              </content>
            </q:slot>
          </div>
        </layout>
      );
    });

the issue is that if you have two components the slot projection ends up in the inert <template> rather than inside of inner component. A quick look I suspect that cursorForComponent is not being called for the inner component. The purpose of the cursor is to abstract away the slot projection, and somehow in this case it is failing.

[manucorporat]

Fixed 7fadd18