Add javadoc for ServerPing.Builder

[Andre601]

Adds Javadoc comments to ServerPing.Builder methods to explain them a little bit.

I tried to keep it brief and only focused on the setter methods.

[Andre601]

That checkstyle action seems broken...
Because it reports issues that aren't there. For example:

• ServerPing.java:162 points to /**
• ServerPing.java:165 is reported as a @param missing a preceding empty line... which it doesn't.

I really don't know why it gives such blatant false positives here.

[electronicboy]

maybe the whitespace after the * on that line? 162 is also the start of that JD comment, of which the first line is infact missing a period; Also, this builder*

Unable to go over it fully, but, some of the descriptions feel a bit, flat

[Andre601]

maybe the whitespace after the * on that line? 162 is also the start of that JD comment, of which the first line is infact missing a period; Also, this builder*

Ngl, kinda dumb if it actually complains about a single space after a * but it's codestyle, so whatever... Addressed that.
Also the this build part was a copy-paste of the mods(ModInfo) javadoc that already existed, so that was there before. Fixed it.

Unable to go over it fully, but, some of the descriptions feel a bit, flat

Feel free to suggest better lines here. Like I said did I keep it to a minimum and honestly are some methods too foregin to me to properly describe (i.e. the mod-related methods).