[rule34hentai] add support

[bun-dev]

updates shimme2.py to allow rule34hentai support. a seperate _posts_rule34hentai function was needed since the base extractor method for posts does not work with it.

[AlttiRi]

BTW, for posts with unapproved tags (with no tags visible) you can use "tag_history" page to get the tags added by the uploader.

const post_id = location.pathname.match(/\d+/)[0]; // "/post/view/123456"
const doc = await fetchDocument("https://rule34hentai.net/tag_history/" + post_id);
const tags = doc.querySelector("#Tag_Historymain > div > div > form > ul span")
    .innerText
    .replaceAll("\n", " ")
    .trim();
console.log(tags);

async function fetchDocument(url) {
    const html = await fetch(url).then(response => response.text());
    return new DOMParser().parseFromString(html, "text/html");
}

---

To highlight them on the main page:

[...document.querySelectorAll(`a[data-tags=""]`)].map(a => {
    a.style.backgroundColor = "#00bcd4b3";
    a.querySelector("img").style.backgroundColor = "#00bcd4b3";    
});