Main content for integrated reader

## Install

```shell
npm install @fluid-topics/ft-reader-content
yarn add @fluid-topics/ft-reader-content
```

## Usage

See [@fluid-topics/ft-reader-context](https://www.npmjs.com/package/@fluid-topics/ft-reader-context) for more
information about integrated readers for Fluid Topics.

```typescript
import { html } from "lit"
import "@fluid-topics/ft-reader-context"
import "@fluid-topics/ft-reader-content"
import "@fluid-topics/ft-reader-topic-context"
import "@fluid-topics/ft-reader-topic-title"
import "@fluid-topics/ft-reader-topic-content"

function render() {
    return html` 
        <ft-reader-context baseUrl="https://my.fluidtopics.com" mapId="<Map ID>">
            <ft-reader-content></ft-reader-content>
        </ft-reader-context>
    `
}
```

By default `ft-reader-content` renders topics as follows:

```html
<ft-reader-topic-context tocId="<Topic ToC ID>">
    <ft-reader-topic-title></ft-reader-topic-title>
    <ft-reader-topic-content></ft-reader-topic-content>
</ft-reader-topic-context>
```