feat: add metadata for SEO and social media sharing - WF-77

[FabienArcellier]

This PR implement a way to manage SEO and social media metadata.

server_setup.py

import writer.serve

writer.serve.configure_page_head(
    title="Fabien Arcellier App",
    meta={
        "description": "My amazing app",
        "author": "Fabien Arcellier",
        "keywords": "fastapi, python, websockets, asyncio, webserver"
    },
    opengraph_tags={
        "og:title": "Fabien Arcellier App",
        "og:description": "My amazing app",
        "og:url": "https://fabienarcellier.com",
        "og:type": "website",
        "og:locale": "en_US",
        "og:image": "https://fabienarcellier.com/logo.png",
    }
)

Now - Before

• document the feature
• share impact of the feature in PR

[FabienArcellier]

rename the function to something more explicit

• configure_app_seo
• configure_app_heads
• ...

Do you have proposal ?

[madeindjs]

I would say configure_html_head

[FabienArcellier]

• configure_webpage_metadata