[Refactor] Rename `types.ex` to `base.ex`

[Arkenan]

We have a file for base types. We should:

1. Rename the file from types.ex to base.ex
2. Rename the module from Types to LambdaEthereumConsensus.Types.Base.
3. Use aliases in files where it's used.

[mabsattar]

Hi can you assign me, I'd like to tackle this!

[MegaRedHand]

Hey @mabsattar! Sorry for the late response. I've assigned the task to you. Please ping me if you have any questions!

[mabsattar]

@MegaRedHand sure, thanks for assigning me.

[mpaulucci]

Hi @mabsattar, any updates on this?

[mabsattar]

Hi @mabsattar, any updates on this?

hi, nope i'm not working on it at the moment.

[mahmudsudo]

can i take on this ?