feat: add Uniswap V2 support

[johnson2427]

What I did

fixes: #5
fixes: SBK-521

How I did it

How to verify it

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)

[fubuloubu]

Looking great to start, we can start thinking about what API to add to these classes and how that might integrate with a silverback bot

Maybe something like:

from ape_tokens import tokens
from silverback import SilverbackApp
from uniswap_sdk import v2 as uni_v2


app = SilverbackApp()
uni_v2_factory = uni_v2.Factory()
usdc = tokens["USDC"]


@app.on_startup()
def load_pools(_ss):
    # NOTE: requires `app.state` PR
    app.state.pools = {
        pool.address: pool
        for pool in uni_v2_factory.get_pools(usdc)
    }
    # Eventually do this as a dataframe?

# NOTE: recent feature suggestion to do generic event filters like this
#       https://github.com/ApeWorX/silverback/issues/99
@app.on_(uni_v2.V2.UniswapV2Pair.Sync)
def update_liquidity(log):
    if pool := app.state.pools.get(log.contract_address):
        pool.update_liquidity(**log)
        return {pool.address: pool.liquidity}

# TODO: has to be a better way to do this through filter args
#       to filter out unnecessary log triggers, something like:
# @app.on_(uni_v2.V2.UniswapV2Pair.Sync, address=app.state.pools)
# def update_liquidity(log):
#     pool = app.state.pools.get[log.contract_address]
#     ...

[linear]

SBK-521 Add UniswapV2 Factory Contract

[fubuloubu]

Looking great to start, we can start thinking about what API to add to these classes and how that might integrate with a silverback bot

...

Updated the API, now looks like this:

from ape_tokens import tokens
from uniswap_sdk import v2

yfi = tokens["YFI"]
factory = v2.Factory()
yfi_pairs = factory[yfi]  # List of all UniswapV2Pair contracts where YFI is one of the pair
...

And then you can put that into a table or something to do filtering and solving with

We will come up with a complementary API for v3