[Internal] Add Pact's farming functionality together with two initial farms

[ipaleka]

https://app.pact.fi/farms

ACTIVE FARMS

ALGO/GOETH https://app.pact.fi/add-liquidity/645869114

ALGO/GOMINT https://app.pact.fi/add-liquidity/682482359

[ipaleka]

As this farming functionality is experimental, we'll manually deploy farms through our issues.

It is expected that our engine will collect new farms in the future.