feat(search): 至少可以搜索中文了！

虽然搜索中文的时候会一整端给你高亮，但至少是能用了

close #9

assets/elasticlunr.js

@@ -0,0 +1,28 @@
+/**
+ * @see https://github.com/HillLiu/docker-mdbook
+ */
+window.elasticlunr.Index.load = (index) => {
+  const FzF = window.fzf.Fzf;
+  const storeDocs = index.documentStore.docs;
+  const indexArr = Object.keys(storeDocs);
+  const ofzf = new FzF(indexArr, {
+    selector: (item) => {
+      const res = storeDocs[item];
+      res.text = `${res.title}${res.breadcrumbs}${res.body}`;
+      return res.text;
+    },
+  });
+  return {
+    search: (searchterm) => {
+      const entries = ofzf.find(searchterm);
+      return entries.map((data) => {
+        const { item, score } = data;
+        return {
+          doc: storeDocs[item],
+          ref: item,
+          score,
+        };
+      });
+    },
+  };
+};

book.toml

@@ -11,6 +11,7 @@ edition = "2021"
 [output.html]
 mathjax-support = true
 no-section-label = true
+additional-js = ["assets/fzf.umd.js", "assets/elasticlunr.js"]
 git-repository-url = "https://gitlab.com/huangjj27/huangjj27.gitlab.io"
 git-repository-icon = "fa-gitlab"
 
@@ -27,4 +28,13 @@ copy-js = true
 line-numbers = false
 
 [output.html.search]
-enable = false      # wait for a usable chinese searching plugin!
+enable = true
+limit-results = 30
+teaser-word-count = 30
+use-boolean-and = true
+boost-title = 2
+boost-hierarchy = 1
+boost-paragraph = 1
+expand = true
+heading-split-level = 3
+copy-js = true