feat(#64): `string$slice` atom + more runtime tests

[maxonfjvipon]

Closes: #64

---

PR-Codex overview

The focus of this PR is to introduce support for BigInt data type and improve error handling in various functions.

Detailed summary

• Updated functions to use BigInt for calculations
• Implemented error handling for division by zero
• Added BigInt support in various tests
• Improved data type conversions to handle BigInt values
• Enhanced error messages and object handling in tests

The following files were skipped due to too many changes: eo2js-runtime/src/runtime/bytes-of.js, eo2js-runtime/src/objects/org/eolang/seq.js, eo2js-runtime/src/objects/org/eolang/string$slice.js, eo2js-runtime/src/objects/org/eolang/try.js, eo2js-runtime/src/runtime/dataized.js, eo2js-runtime/src/runtime/object.js, eo2js-runtime/test/runtime/bytes-of.test.js, eo2js-runtime/test/runtime/dataized.test.js

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[maxonfjvipon]

@rultor merge

[rultor]

@rultor merge

@maxonfjvipon OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@maxonfjvipon Done! FYI, the full log is here (took me 21min)