Add support for `Floatx80` new type (#28)

Add proper support for new `Floatx80` introduced in yrp604/bochscpu#12
in the `State` structure - without which segfault happened.

A collection of minor improvements (#23)

- clang-format + black 
- added some default callbacks for the python api
- added convenience variables to the bochscpu session

workaround bug in bochscpu api, cpu id is not ignored, enforcing value 0

[CI] Adding Python 3.12 build to GithubActions (#19)

[CI] Revert to use `HEAD` for `bochscpu-build` (#17)

Since yrp604/bochscpu-build#4 was merged

[CI] Trigger on push to tags (releases)

[CI] Revise trigger events

Update README.md

Fully completed the README documentation, added a basic TODO list for what's left

Added badges and lib object links to README

Make `examples/fib.py` work on Linux too directly (#3)