Add read est to posts

@@ -332,6 +332,18 @@ class BlogPostPage(RoutablePageMixin, StreamPageAbstract):            filename = hashlib.md5(self.full_url.encode("utf-8")).hexdigest()            return f"post_pdfs/{filename}.pdf"    def get_read_time(self):        """        Get the number of words from the body of the post and calculate the        number of minutes it will take to read.        Most people read at 200 words per minute.        :return: The number of minutes it will take to read the post.        """        words = str(self.body).split()        return round(len(words) / 200)    @route(r'^$')    def post(self, request):        return self.render(request)

@@ -21,12 +21,17 @@<div class="container mt-5">  <div class="row">    <div class="col-12 col-md-8 col-lg-6">      <div class="mb-2">        {% for tag in self.tags.all %}        <a href="{% routablepageurl self.get_parent.specific 'tag' tag.slug %}" class="btn btn-secondary btn-sm rounded-pill py-0">          {{ tag|title }}        </a>        {% endfor %}      <div class="d-flex justify-content-between align-items-center">        <div class="mb-2">          {% for tag in self.tags.all %}          <a href="{% routablepageurl self.get_parent.specific 'tag' tag.slug %}" class="btn btn-secondary btn-sm rounded-pill py-0">            {{ tag|title }}          </a>          {% endfor %}        </div>        <div class="mb-2">          {{ self.get_read_time }} min read        </div>      </div>      <h1 class="fw-bolder">{{ self.title }}</h1>      <p class="h5 text-muted">{{ self.search_description }}</p>