Base: Add manpage for Screenshot

Base/usr/share/man/man1/Applications/Screenshot.md

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+## Name
+
+![Icon](/res/icons/16x16/app-screenshot.png) Screenshot
+
+[Open](file:https:///bin/Screenshot)
+
+## Synopsis
+
+```**sh
+$ Screenshot
+```
+
+## Description
+
+`Screenshot` is an application for taking screenshots.
+
+Its interface remains invisible in screenshots, ensuring a clean capture.
+
+## Options
+
+* **Whole desktop** - Capture the entire user interface, including the cursor if it's visible on the desktop.
+* **Selected area** - Click and drag to select a specific area. Release the mouse button to take a screenshot. The cursor will not be included.
+* **Edit in Pixel Paint** - Open the screenshot as a new image in [Pixel Paint](help:https://man/1/Applications/PixelPaint) for quick annotations.
+* **Select Folder** - Customize the destination folder for saving screenshots. By default, they are saved in the *Pictures* folder.
+
+## See Also
+
+* [`shot`(1)](help:https://man/1/shot) Command line screenshot tool with more options