Add dynamic SHA256 update method

Description

This implementation enables streaming preimage bytes into a provable SHA256 hash function.
It is primarily an adaptation of StableLib's SHA256 class, modified to be provable.

Added a SHA256Hasher class.
Introduced an optional boolean reverseEndianness parameter to the bytesToWords, wordsToBytes, wordToBytes, and bytesToWord functions in the bit-slices.ts file.
Created a zkProgram that demonstrates similar functionality to SHA256Program but dynamically.
Added sliding window tests inspired by noble-hashes test in accordance with the noble approach to testing.

There is some redundant code in the hashBlocks method of the hasher class since the core logic is copied from the original SHA256.hash() function.
The dynamic SHA256 is slightly less efficient than the original SHA256 hash function, likely due to byte processing:
- For Bytes12 input:
- SHA256.hash --> 5036 rows
- SHA256.update --> 5241 rows
It's noteworthy that a fluent interface or method chaining works as provable in o1js, which opens up possibilities for various future implementations.
Attempting to witness a hasher instance with Provable.witness is currently not possible, but it would be a valuable feature.
Observing how noble-hashes use abstract classes with method chaining suggests that it might be possible to migrate many binary hash functions to be provable in o1js, similar to noble-hashes.