Base: Move GUI application man pages into their own subsection

We do not want to move POSIX utilities into subsections since they have
standard names, but we can do whatever we want with Applications :^).
This is particularly advantageous as many applications contain several
images, which declutters the man1 directory.

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

@@ -0,0 +1,36 @@
+## Name
+
+Applications - SerenityOS GUI applications
+
+## Description
+
+SerenityOS comes with a suite of GUI applications. The applications are divided into multiple categories, through which they are available in the start menu.
+
+Note that many applications can be disabled at SerenityOS build time if desired. Therefore, depending on your SerenityOS build configuration, not all applications may be available. 
+
+## See also
+
+- Documentation for SerenityOS Games in section 6
+
+### List of Application manpages
+
+- [About](help://man/1/Applications/About)
+- [Analog Clock](help://man/1/Applications/AnalogClock)
+- [Assistant](help://man/1/Applications/Assistant)
+- [Browser](help://man/1/Applications/Browser)
+- [Calculator](help://man/1/Applications/Calculator)
+- [Calendar](help://man/1/Applications/Calendar)
+- [Character Map](help://man/1/Applications/CharacterMap)
+- [Eyes](help://man/1/Applications/Eyes)
+- [FontEditor](help://man/1/Applications/FontEditor)
+- [GML Playground](help://man/1/Applications/GMLPlayground)
+- [Hex Editor](help://man/1/Applications/HexEditor)
+- [Image Viewer](help://man/1/Applications/ImageViewer)
+- [Inspector](help://man/1/Applications/Inspector)
+- [Magnifier](help://man/1/Applications/Magnifier)
+- [Mail](help://man/1/Applications/Mail)
+- [Mouse Settings](help://man/1/Applications/MouseSettings)
+- [Presenter](help://man/1/Applications/Presenter)
+- [SQL Studio](help://man/1/Applications/SQLStudio)
+- [Terminal](help://man/1/Applications/Terminal)
+- [Text Editor](help://man/1/Applications/TextEditor)