MiniMessage support for MOTD

[qixils]

Is your feature request related to a problem?

Currently, the only way to set the MOTD of a server without plugins is using the motd field in server.properties which uses legacy section formatting instead of MiniMessage.

Describe the solution you'd like.

Add a config option to paper-global.yml's messages section which allows specifying an MOTD using MiniMessage which overrides the one set in server.properties

Describe alternatives you've considered.

Spending like 5 minutes to create a new Paper project in IntelliJ and setting the MOTD myself with Components

Other

No response

[FlowerDevelops]

I'll work on this and make a PR

[Doc94]

Currently exists a PR related to this if wanna check/review: #14297