Base: Add more manpages for command-line utilities

Base/usr/share/man/man1/basename.md

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+## Name
+
+basename - strip directory names from path
+
+## Synopsis
+
+```**sh
+$ basename <path>
+```
+
+## Description
+
+`basename` prints basename (filename, stripped of preceding directory names) of specified `path` to standard output. The path does not have to exist.
+
+## Arguments
+
+* `path`: The path which we want to get basename of
+
+## Examples
+
+```sh
+$ basename /
+/
+$ basename ~
+anon
+$ basename Source/js/array.js
+array.js
+```