feat: diagram rendering + post-processor (wip)

server/modules/rendering/html-diagram/renderer.js

@@ -0,0 +1,10 @@
+module.exports = {
+  async init($, config) {
+    $(`pre.diagram`).each((idx, elm) => {
+      $(elm).children('svg').each((sidx, svg) => {
+        $(svg).removeAttr('content')
+      })
+      $(elm).replaceWith($(`<div class="diagram">${$(elm).html()}</div>`))
+    })
+  }
+}