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/Profiler.md

@@ -0,0 +1,53 @@
+## Name
+
+![Icon](/res/icons/16x16/app-profiler.png) Profiler - Serenity process profiler
+
+[Open](file:///bin/Profiler)
+
+## Synopsis
+
+```**sh
+$ Profiler [--pid PID] [perfcore-file]
+```
+
+## Description
+
+Profiler facilitates process performance profiling and provides a GUI offering
+visual graph and tree representations to easily navigate generated profiling
+information.
+
+If no arguments are provided, a window containing a list of running processes
+is presented, allowing a process to be selected for profiling.
+
+Profiling information is written to `perfcore.<pid>` in the working directory
+and opened immediately for browsing following termination of profiling.
+
+Profiler can also load performance information from previously created
+`perfcore` files.
+
+## Options
+
+* `-p PID`, `--pid PID`: PID to profile
+
+## Arguments
+
+* `perfcore-file`: Path of perfcore file to load
+
+## Examples
+
+Profile running Shell process:
+
+```sh
+$ Profiler -p $(pidof Shell)
+```
+
+Open a previously created perfcore file for browsing:
+
+```sh
+$ Profiler perfcore.123
+```
+
+## See also
+
+* [`perfcore`(5)](help://man/5/perfcore)
+