ddgr: add page (#11060)

* ddgr: add page

* ddgr: add more examples

* ddgr: fix error

* ddgr: requested changes applied

pages/common/ddgr.md

@@ -0,0 +1,36 @@
+# ddgr
+
+> Commandline utility to search DuckDuckGo (html version) from the terminal.
+> More information: <https://github.com/jarun/ddg>.
+
+- Start interactive mode:
+
+`ddgr`
+
+- Search DuckDuckGo for a keyword:
+
+`ddgr {{keyword}}`
+
+- Limit the search results number to N:
+
+`ddgr -n {{N}} {{keyword}}`
+
+- Show 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:
+
+`?`