Manpages: Auto-generate many through ArgsParser

This set was hand-curated, guided by the questions:
- Does it have at least three options, i.e. is the help page
  non-trivial?
- Is the program unusual, i.e. does listing it in Help or on
  man.serenityos.org spread awareness?
- Is the program common, but we only implement a subset of 'common'
  flags?

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

@@ -0,0 +1,18 @@
+## Name
+
+TelnetServer
+
+## Synopsis
+
+```sh
+$ TelnetServer [-p port] [-c command]
+```
+
+## Options:
+
+* `--help`: Display help message and exit
+* `--version`: Print version
+* `-p port`: Port to listen on
+* `-c command`: Program to run on connection
+
+<!-- Auto-generated through ArgsParser -->