[SCRAM] Move cryptography-related functions into the Typescript package

[interestIngc]

Create a new Typescript package that would export functions necessary to calculate hashes in the SCRAM protocol. Then inject these functions into the frontend by compiling a bundled file.

The goals for implementing that would be:

• to implement hash generation functions in a statically-typed programming language;
• to enable unit tests;
• to be able to reuse these functions across different htmls (i.e. in different flows);

Acceptance criteria:

1. The flow works end-to-end using cryptography-related functions from the new package;
2. Unit tests for the Typescript functions are implemented and pass successfully;