Implement Endorsement Count for Plugins

[Kouzukii]

As suggested on Discord, I'd like to add a simple endorsements system to Dalamud to positively reinforce plugin development and enable users to leave positive feedback without having to write a message through the "Leave Feedback" system.

Included in this PR:

• Endorsement Count is included in the PluginMaster
• New POST action to increment endorsement count for a plugin
• Rate limiting to 10 requests per minute per IP per XLWebServices server

Relevant pull requests:

• Client Side Implement Plugin Endorsements Dalamud#1403
• Translations Add translations for endorsements DalamudAssets#154

[goaaats]

Some thoughts, if we do want this:

• I think rate-limiting on the server is a must. 10 endorsements per minute or so, maybe by hashing the IP?
• It would be awesome to have a sort of time series of endorsements that is flushed into the database for each plugin as a daily job. We could use this for download counts as well and then draw graphs.

[Kouzukii]

• I think rate-limiting on the server is a must. 10 endorsements per minute or so.

Per IP or per plugin?

• It would be awesome to have a sort of time series of endorsements that is flushed into the database for each plugin as a daily job. We could use this for download counts as well and then draw graphs.

We could implement this through a redis hash with the day as a secondary key.
To speed up the PluginMaster read we could continue to use the simple counter for the total count.