Build plugin with vs2022/scons4.7

[MatteoPiovanelli]

this is the PR related to #21

Made members of Bullet protected so they may be accessed in inherited classes

Added methods to increase cycle and lifetime of Bullet, mostly for readability. Use getters/setters rather than fields in bullet kits

[MatteoPiovanelli]

I'm not entirely sure what the best way is to get rid of the submodule update from this PR

[MatteoPiovanelli]

I'm not sure my changes are all correct.
The video here shows what is currently happening in the second example, off the repo as is (in branch 4.x):
https://github.com/samdze/godot-native-bullets-plugin/assets/19283945/e5c1b37f-776c-4d11-84e2-9890e93b355f

I'm not sure this is the intended behaviour. From the main page here on github I'd think not.

[MatteoPiovanelli]

ok, I found the issue: by using the setter I was resetting the starting_transform, so other computations depending on it would get messed up.