Add config for length player name

[ramon-bernardo]

Pull Request Prelude

• I have followed proper The Forgotten Server code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

• Add config for lenght player name
• Now we can easily change to 25 and have 12.x support

[Zbizu]

there doesn't seem to be any real limit to names length from client side
Edit: 8192 chars probably, roughly enough to fill half of the screen. Also: XML supports <br /> tag in monster name, but ignores other tags.

I wasn't able to log in as a character with more than 70 chars in name though.