Add pug and html renderer. Implement hidden flag.

src/renderer/html.ts

@@ -0,0 +1,19 @@
+import Renderer , {File} from "../renderer.js"
+import fs from 'fs'
+import path from 'path'
+import matter from 'gray-matter'
+
+export default class Html implements Renderer {
+  name = "html"
+  fileExtensions = ["htm", "html"]
+
+  loadAsHTML(filePath: string): File {
+    const fileContents = fs.readFileSync(path.join("./", filePath), 'utf8')
+    const { data: metadata, content: htmlContent } = matter(fileContents)
+
+    return {
+        data: metadata,
+        html: htmlContent 
+    }
+  }
+}