chore(i18n): refactor and cleanup (#805)

* checkpoint

* finish

* docs

quartz/components/Footer.tsx

@@ -1,7 +1,7 @@
 import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
 import style from "./styles/footer.scss"
 import { version } from "../../package.json"
-import { i18n } from "../i18n/i18next"
+import { i18n } from "../i18n"
 
 interface Options {
   links: Record<string, string>
@@ -15,8 +15,8 @@ export default ((opts?: Options) => {
       <footer class={`${displayClass ?? ""}`}>
         <hr />
         <p>
-          {i18n(cfg.locale, "footer.createdWith")}{" "}
-          <a href="https://quartz.jzhao.xyz/">Quartz v{version}</a>, © {year}
+          {i18n(cfg.locale).components.footer.createdWith}{" "}
+          <a href="https://quartz.jzhao.xyz/">Quartz v{version}</a> © {year}
         </p>
         <ul>
           {Object.entries(links).map(([text, link]) => (