feat(route): add howtoforge (#14538)

* add howtoforge

* Update study.mdx

* 更新 rss.js

* 更新 radar.js

* 更新 radar.js

lib/v2/howtoforge/maintainer.js

@@ -0,0 +1,3 @@
+module.exports = {
+    '/': ['cnkmmk'],
+};

lib/v2/howtoforge/radar.js

@@ -0,0 +1,13 @@
+module.exports = {
+    'howtoforge.com': {
+        _name: "Howtoforge Linux Tutorials",
+        '.': [
+            {
+                title: '学习',
+                docs: 'https://docs.rsshub.app/routes/study#howtoforge-linux-tutorials',
+                source: ['/'],
+                target: '/howtoforge',
+            },
+        ],
+    },
+};

lib/v2/howtoforge/router.js

@@ -0,0 +1,3 @@
+module.exports = function (router) {
+    router.get('/', require('./rss'));
+};

lib/v2/howtoforge/rss.js

@@ -0,0 +1,32 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const currentUrl = 'https://www.howtoforge.com';
+    const response = await got(`${currentUrl}/feed.rss`);
+    const $ = cheerio.load(response.data, { xmlMode: true });
+    const titleMain = $('channel > title').text();
+    const descriptionMain = $('channel > description').text();
+    const items = $('channel > item')
+        .map((_, item) => {
+            const $item = $(item);
+            const link = $item.find('link').text();
+            const title = $item.find('title').text();
+            const description = $item.find('description').text();
+            const pubDate = $item.find('pubDate').text();
+            return {
+                link,
+                pubDate, // no need to normalize because it's from a valid RSS feed
+                title,
+                description,
+            };
+        })
+        .get();
+
+    ctx.state.data = {
+        title: titleMain,
+        description: descriptionMain,
+        link: currentUrl,
+        item: items,
+    };
+};