feat: Integrate Negentropy RBSR library for Waku Sync

[jm-clius]

This issue relates to the implementation of a proposed underlying protocol for Waku Sync as set out in waku-org/research#80
One viable technical solution to achieve is to use a RBSR mechanism similar to that implemented in https://github.com/hoytech/negentropy
This issue tracks the work necessary to integrate this library into nwaku and test its suitability for a sync mechanism.

cc @SionoiS @chaitanyaprem

[SionoiS]

my work on this topic can be seen in this PR #2403

[chaitanyaprem]

After doing some digging wrt issue faced in integrating negentropy and consulting nim team, it has been identified that in order to use the negentropy C++ API directly in nim, it would require nim to be compiled as c++ code instead of C(that is being done currently). This is not recommended by nim team as there are limitations and we may run into issues.

Note: If there were no templates used in the C++ code, then we could integrate directly into nim by using extern-C, but since negentropy using templates this would not work. Ref

Ref Query and pointers:

• https://discord.com/channels/613988663034118151/616299964242460682/1207675010387419136
• https://status-im.github.io/nim-style-guide/libraries.wrappers.html?highlight=c%2B%2B#cons

Hence as suggested, proceeding with writing a C API wrapper for negentropy which can then be used in the Waku-sync code.