Add FIL to the list of Major category assets

This proposal would add FIL to the list of assets that Osmosis recognises as strategically important for growth, increasing the incentives allocated to it. \n\n## Details\nFIL is currently the rank 31 cryptocurrency by marketcap with a valuation of around $1.9 Billion, 5 times higher than Osmosis. The majority of trade volume happens on centralised exchanges, not on Osmosis, there are currently no decentralised exchanges listing FIL. This proposal asks if Osmosis has a strategic interest in attracting more liquidity of FIL and so will enable it to access a greater proportion of liquidity incentives. \n\n## About FIL\nFilecoin is a peer-to-peer network that allows anyone to store and retrieve data on the internet. Built-in economic incentives ensure that files are stored and retrieved reliably and continuously for however long a user specifies. \n\nFilecoin is provided through the Axelar bridge from the Filecoin network. The Filecoin network runs the Filecoin Virtual Machine (FVM), a runtime environment for smart contracts written in Solidity. \n\nWebsite: https://filecoin.io/\n\nCommonwealth Thread: https://commonwealth.im/osmosis/discussion/11304-filecoin-incentives