Move pages under tldr, lint run.sh, update docs

tldr/ddgr

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ddgr
+
+> Search DuckDuckGo (HTML version) from the terminal.
+> More information: <https://github.com/jarun/ddgr>.
+
+- Start in interactive mode:
+
+`ddgr`
+
+- Search DuckDuckGo for a keyword:
+
+`ddgr {{keyword}}`
+
+- Limit the number of search results to `N`:
+
+`ddgr -n {{N}} {{keyword}}`
+
+- Display the complete URL in search results:
+
+`ddgr -x {{keyword}}`
+
+- Search DuckDuckGo for a keyword and open the first result in the browser:
+
+`ddgr !w {{keyword}}`
+
+- Perform a website-specific search:
+
+`ddgr -w {{site}} {{keyword}}`
+
+- Search for a specific file type:
+
+`ddgr {{keyword}} filetype:{{filetype}}`
+
+- Display help in interactive mode:
+
+`?`