Add Adventure Javadocs to Javadocs page

[aurorasmiles]

Closes #79

[Proximyst]

Sounds like a good idea to me. Perhaps also worth adding a note in the Paper pom(s) that this needs updating if we update it over there?

[Trigary]

There's a line further up: "You can view the javadocs for specific versions of Paper or Waterfall below."
That line should probably be modified, as now JavaDocs other than Paper's and Waterfall's are linked on the page.

[kashike]

Sounds like a good idea to me. Perhaps also worth adding a note in the Paper pom(s) that this needs updating if we update it over there?

Definitely this.

[aurorasmiles]

Sounds like a good idea to me. Perhaps also worth adding a note in the Paper pom(s) that this needs updating if we update it over there?

Definitely this.

PR opened: PaperMC/Paper#5422

[kashike]

This does not include javadocs for the other projects we package - might be good to have a dropdown?

• API
• JSON
• Legacy

[MiniDigger]

alternative would be to have those buttons inline

[kezz]

Plain serializer is also included - also, the version is out of date here as well.

[zml2008]

We now have an index page that could be directly linked to, plus latest version aliases for every module (for example, https://jd.adventure.kyori.net/api/latest/) that could reduce the maintenance burden on keeping these links up to date. Is it worth revisiting this PR using those new resources?