i18n: refactor translations for docs site (#181)

* i18n: move some translations under example site

* chore: update i18n/ja.yaml

* i18n: update zh-tw.yaml

* i18n: update fr.yaml

* i18n: update pt.yaml

* i18n: update ko.yaml

* i18n: update nb.yaml and nn.yaml

* i18n: update sw.yaml

* i18n: update vi.yaml

* i18n: update sw.yaml

* docs: clean up ja site as it's incomplete

exampleSite/i18n/zh-cn.yaml

@@ -0,0 +1,6 @@
+documentation: "文档"
+showcase: "项目展示"
+blog: "博客"
+about: "关于"
+more: "更多"
+hugoDocs: "Hugo 文档 ↗"