Docs: Add unzip(1) man page

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

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+## Name
+
+unzip - extract files from a ZIP archive
+
+## Synopsis
+
+```**sh
+$ unzip file.zip
+```
+
+## Description
+
+unzip will extract files from a zip archive to the current directory. 
+
+The program is compatible with the PKZIP file format specification.
+
+## Examples
+
+```sh
+# Unzip the contents from archive.zip
+$ unzip archive.zip
+Archive: archive.zip
+ extracting: file1.txt
+ extracting: file2.png
+```