feat: add tag index page

- https://github.com/hexojs/hexo-generator-tag/pull/44

_config.yml

@@ -24,6 +24,8 @@ pretty_urls:
 source_dir: source
 public_dir: public
 tag_dir: tags
+tag_generator:
+  enable_index_page: true
 archive_dir: blog
 category_dir: categories
 code_dir: ''

themes/chameleon/layout/tag-index.ejs

@@ -0,0 +1,10 @@
+<div class="archive-container">
+  <%- partial('_partial/header', {}, { cache: true }) %>
+  <hr class="header-hr"/>
+  <h2>Tags:</h2>
+  <%- list_tags({
+    amount: 0,
+    class: 'index',
+    transform: titlecase
+  }) %>
+</div>