Docusaurus-ify (#26051)

This PR cleans up the docs in a way to make them simpler to ingest by
our [docs repo](https://gitea.com/gitea/gitea-docusaurus).

1. It includes all of the sed invocations our ingestion did, removing
the need to do it at build time.
2. It replaces the shortcode variable replacement method with
`@variable@` style, simply for easier sed invocations when required.
3. It removes unused files and moves the docs up a level as cleanup.

---------

Signed-off-by: jolheiser <john.olheiser@gmail.com>

docs/content/installation/from-binary.zh-tw.md

@@ -0,0 +1,37 @@
+---
+date: "2016-12-01T16:00:00+02:00"
+title: "執行檔安裝"
+slug: "install-from-binary"
+sidebar_position: 15
+toc: false
+draft: false
+aliases:
+  - /zh-tw/install-from-binary
+menu:
+  sidebar:
+    parent: "installation"
+    name: "執行檔"
+    sidebar_position: 15
+    identifier: "install-from-binary"
+---
+
+# 從執行檔安裝
+
+所有的執行檔皆支援 SQLite, MySQL and PostgreSQL，且所有檔案都已經包在執行檔內，這一點跟之前的版本有所不同。關於執行檔的安裝方式非常簡單，只要從[下載頁面](https://dl.gitea.com/gitea)選擇相對應平台，複製下載連結，使用底下指令就可以完成了:
+
+```
+wget -O gitea https://dl.gitea.com/gitea/@version@/gitea-@version@-linux-amd64
+chmod +x gitea
+```
+
+## 測試
+
+執行完上述步驟，您將會得到 `gita` 執行檔，在複製到遠端伺服器前，您可以先測試看看，在命令列執行完成後，可以透過 `Ctrl + C` 關閉程式。
+
+```
+./gitea web
+```
+
+## 需要協助？
+
+如果本頁中無法解決您的問題，請直接到 [Discord server](https://discord.gg/Gitea)，在那邊可以快速得到協助。