Improve scheduler task conversion logic

[x3c41a]

This issue is intended to track the implementation of scheduler's conversion logic in Typescript.
I'll come back to it once I finish the orchestration script.
Also, I need an answer on #72 to be able to finish the tests.

The Typescript and Rust implementations currently differ. The Rust logic relies on multiple internal types defined throughout the codebase, which are not recognized by TypeScript. At the moment, Rust test framework does a few conversions of scheduler.agenda.tasks using those types and helper functions.
For now I decided to replace complex RC to AH conversion logic with a simple toJson() on the original struct - #64

Work left to be done:

• getTaskCallEncodings is translated
• rust origin conversion - link
• rust encoded_call conversion - link

[x3c41a]

Encoded call conversion is quite complex, there are many nested functions that also need to be translated/implemented.
I made a simple trick with origin conversions but I'll leave encoded_call conversion til the very end, might need some help here.