add papi placeholder

[Zarkness]

Describe the Feature

add the possibility to use the placeholder %uniquejoins% in other places not only in the plugin messages but also in any other place such as the scoreboard

Provide Reasoning

possibility to use it on scoreboards or tabs or holograms and show how many players connected in total

Checklist

• [X] I have searched the issue tracker to ensure there are no similar feature requests
• [X] I have read the wiki to ensure this isn't already possible
• [X] I ticked all of the boxes without actually reading them

[Zarkness]

hi, insprill on this issue #44 that i opened some time ago, could you add something like this plugin has to be able to use both minimessage and legacy colors at the same time?

https://github.com/kyngs/LibreLogin/blob/master/Plugin/src/main/java/xyz/kyngs/librelogin/common/config/HoconMessages.java

https://github.com/kyngs/LegacyMessage/blob/master/LegacyMessage/src/main/java/xyz/kyngs/utils/legacymessage/LegacyMessage.java

[Insprill]

You can get all CJM placeholders from PAPI extensions. %server_unique_joins% from the Server extension (/papi ecloud download Server) does what CJM's %uniquejoins% does.

Please don't bring up topics from other issues that are unrelated. If you have more to add to a closed issue, you can still comment there, and I'll reopen it if deemed necessary.