* Stable curve math rewritten to 256-bit, reference simulation added with test integration
* Formatting error fixed
* Clippy warnings fixed
* Fixed dependencies to remove crates not supportinf bpf
* Fixed indentations
* Fixed lint errors
* Fixed format warnings
* Fixing clippy lint errors
* U256 math and simulation library refactoring, checked math used everywhere, other small fixes
* Fixed conversion to optional u128
* Added stable curve invariant to the token swap smart contract
* Fixed formatting
* Added missing stable curve constraints
* Symbol renames to make math clearer
* Small refactoring according to PR comments, fixes for JS tests