Add support for ranged item amounts in Give and GiveAll commands

[AerWyn81]

This pull request adds support for specifying a random amount range when using the give and giveall server item commands. Users can now enter an amount as a single number or as a range (e.g., 1-10), and the command will randomly select an amount within that range. Additionally, tab completion has been updated to suggest common ranges.

Command functionality improvements:

• Added support for amount ranges (e.g., 1-10) in the give and giveall commands. The code parses the range, validates it, and randomly selects an amount within the specified range.

Tab completion enhancements:

• Updated tab completion for the amount argument in both Give.java and GiveAll.java to suggest common ranges like 1-10 and 1-64, in addition to single values.

Tested in production.