Simplify EthFrame implementation

[rakita]

Frame trait seems great, but implementation for Eth seem bloated. find the way how to make it nicer and more manageable

[Ayushdubey86]

@rakita , is there a need of different init_first & init? was thinking to refactor this, but it has big impact at handler.rs as well

[rakita]

The first one was for initializing the first frame, IIRC correctly it is to have memory, and the second one is for others. Probably can be done with only one functions but I am not sure how would that look

[Ayushdubey86]

It'll take some time, but I'll look into this

[Ayushdubey86]

Analysis on EthFrame Method:

After reviewing the init and init_first methods, I considered combining them. However, I did not observe any significant performance gains or simplification. In fact, merging them might increase complexity for new contributors.

As an alternative, I suggest renaming the methods to more descriptive names and improving the documentation to enhance clarity. If you have any other insights or spot potential improvements, feel free to share.
@rakita