Add a !docs command

[Andre601]

The Discord could really benefit from Clippy having a !docs command

This command would essentially search the LuckPerms Javadoc for the provided info and returns whatever it can find for it.

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Example

Running !docs NodeAddEvent#getNode() would give the below output (as Embed)

@NonNull NodeAddEvent#getNode() : Node
Gets the node that was added

Returns:
The node that was added

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Issues/Downsides

The Javadocs are built agains Java 8.
This comes with the issue, that the URL won't reflect the current class/method being selected.
For example, would the above example still display the URL as https://javadoc.io/doc/net.luckperms/api/latest/index.html while it should preferably display as https://javadoc.io/doc/net.luckperms/api/latest/net/luckperms/api/event/node/NodeAddEvent.html#getNode() since this is a more reliable and shareable link.

[Andre601]

From what I understand could the bot download the latest LuckPerms API jar from jenkins and extract the required information from it.

This is what JDAButler does (afaik) in the JDA Discord:
https://github.com/Almighty-Alpaca/JDA-Butler

This still won't solve the issue that the Javadocs are build against Java 8, meaning that the URL won't update based on what class/method was selected.
This should really be improved.

[Turbotailz]

I'd probably just add lucko/LuckPerms as a submodule and use a package like this

https://www.npmjs.com/package/javadoc