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/Inspector.md

@@ -0,0 +1,31 @@
+## Name
+
+![Icon](/res/icons/16x16/app-inspector.png) Inspector - Serenity process inspector
+
+[Open](file:///bin/Inspector)
+
+## Synopsis
+
+```**sh
+$ Inspector [pid]
+```
+
+## Arguments
+
+* `pid`: Process ID to inspect
+
+## Description
+
+Inspector facilitates process inspection via RPC.
+
+To inspect a process, it must have `MAKE_INSPECTABLE=1` in its environment,
+and it must have previously allowed the
+[`accept`(2)](help://man/2/accept) system call with
+[`pledge`(2)](help://man/2/pledge) to allow inspection
+via UNIX socket.
+
+## Examples
+
+```sh
+$ Inspector $(pidof Shell)
+```