feat: Lighthouse provider

[fmrmf]

What I did

Added Lighthouse provider for connecting with Beacon chain.

How I did it

Moved LighthouseProvider from ape-beacon into this repo. Resolves naming issues in #11.

How to verify it

Start your lighthouse node

lighthouse bn --http

run in ape-lighthouse dir

python

then e.g.

>>> from ape import networks
>>> with networks.beacon.mainnet.use_provider("lighthouse") as provider:
...    bal = provider.get_balance("0")
...    print('bal', bal)
... 
INFO: Connecting to existing Lighthouse node at 'http://localhost:5052'.
bal 33606621886

Checklist

• Passes all linting checks (pre-commit and CI jobs)
• New test cases have been added and are passing
• Documentation has been updated
• PR title follows Conventional Commit standard (will be automatically included in the changelog)