Add ability to store persistent values in a JSON file

[jmakhack]

Task Context

As part of #311, new functionality was added to log the total amount of hydration breaks for a user across multiple sessions. The value is currently stored in totalHydrationBreaks.log as a numeric value. The goal for this task is to store the value in a json file instead to allow for new potential fields to be added in the future.

Acceptance Criteria / Goals

The acceptance criteria for this task is to replace the totalHydrationBreaks.log usage with a new json file HydrationReminderStats.json.

The json object stored should look something like the following:

{
    "totalHydrateCount": 0
}

This will allow for more fields and persistent data to be added in the future as needed.

Additional Notes

There should be other RuneLite plugins that follow this design as well. They may be a good resource to look into to see how they handle this issue. For example: https://github.com/zenpj/eclectic-jars/blob/master/src/main/java/com/eclectic/EclecticPlugin.java

Please refer to CONTRIBUTING.md for info on how to setup, build, run, and test this project. Feel free to ping @jmakhack in the comments below with any questions if needed. Also, join the Discord to meet and engage with other contributors!

[Jacoberson]

@jmakhack I can do this.