remake/readd/fix support for the EXP plugin

[XorOwl]

Is your feature request related to a problem? Please describe.
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a recent update caused the exp plugin to stop functioning

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I'd like the EXP plugin to work again, either by remaking it using what new structural requirements pwnagotchi now has, or by fixing it the existing one and including it
i think it was really neat, and makes using the pwnagotchi more fun, and would like to see some form of it working again

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the original creator of the plugin likely has moved on, as it was updated like 2 years ago. i don't think they'll be updating it

Additional context
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i like to watch the bar go up.
i like to watch numbers go up.
Doesn't need to be that complicated