improvement: enable custom duration and simplify expiration calculation

[omarcopires]

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

Allows setting a custom ban duration and simplifies the expiration time calculation.

[omarcopires]

The behavior of the /ban and /ipban commands has been modified to allow specifying a custom number of days instead of using the fixed value of 7 days. Additionally, the code's readability has been improved by using string.format for the return messages.

All TalkActions have been centralized into a single file (revscript), making the code easier to maintain, organize, and access.
A new function has also been added to the Game to simplify access to a player's accountId.
Although I have not tested all the changes, I am available to address any issues or make further adjustments if needed.

[ranisalt]

Doesn't seem to break anything that wasn't broken already, nice change 👍