added a history tracker to get coverage information about the execution of the binary

[anotherdish]

this feature set expands on the idea of being able to explore execution/coverage of a binary from qiling

current coverage features include tracing and drcov, but no way of interacting with the execution history directly from within python. this feature allows a user to more easily explore the execution history, and some convenience functions to support the exploration

Checklist

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• This PR only contains minor fixes.
• This PR contains major feature update.
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