Improve boilerplate implementation

[Headline]

Fixes #152
This is an extension to the boilerplate implementation, we'll see a few things developed on this branch.

This patch will move some of the regex creation to be in the constants.rs and prevent regex recompilation after every compilation request, something that we needed to bring lazy_static in to accomplish.

Our end goal is to move function declarations out of main methods, that way functions can be created and moved to their correct places as needed.

We'll need a regex made that allows us to detect function definitions. Unlike our main regexes, we'd need to match functions that could have templated/generic return types. Let's use C++ as an example.

std::vector < int > myfunc(int a, int b) {
    return std::vector{a, b};
}
for (auto i : myfunc(3, 5)) {
    std::cout << i << std::endl;
}

A request in this form should not trip up our detection, so correctly matching any function call regardless of it's return type form might be tricky, we'll have to see.