Bytecode DSL

[chfast]

Enhance the bytecode utility (from bytecode.hpp.

### Tasks
- [ ] Rethink syntax (see below)
- [ ] Use S-expressions?
- [ ] Add support for jump labels
- [ ] Add support for user-defined macros
- [ ] Add support for user-defined functions

Syntax

Concatenation (current)

mstore(0, add(mload(0), 1)) + revert(0, msize());

Dot

mstore(0, add(mload(0), 1)).revert(0, msize());

Inheritance

{
    mstore(0, add(mload(0), 1));
    revert(0, msize());
}

Aggregate initialization

bytecode{
    mstore(0, add(mload(0), 1)),
    revert(0, msize()),
};

[chfast]

Some inspirations:

• x86 assembly in C++ templates: https://github.com/mattbierner/Template-Assembly
• the C++ "overloaded lambdas" pattern: https://stackoverflow.com/questions/48661148/c17-inheriting-set-of-lambdas-with-template-argument-deduction-guides
• macro-free unit testing: https://github.com/boost-ext/ut
• my playground: https://godbolt.org/z/j4zohaWGY