[feature] AffiliateCollector Module + Preferred Asset Swap #check-lint-warning

Closes #1000 (closed)

• Adds a AffiliateCollector module, which keeps track of earned $RUNE for affiliates with a PreferredAsset set on their THORName.
• $RUNE is accrued, associated with the THORName's owner address, in the AffiliateCollector module
• New constant: PreferredAssetOutboundFeeMultiplier (initially set at 100): When the accrued RUNE is greater than outbound_fee(preferred_asset.chain) * multiplier, the preferred asset swap is triggered
• #check-lint-warning added as THORName parsing was added to the SwapMemo struct and the NewSwapMemo function signature changed