[dNDX Parameters] Minimum NDX Deposit

Per discussion from this thread: https://forum.indexed.finance/t/create-dndx-a-dividends-token-for-indexed-fee-revenue/610

This vote is to establish the minimum amount of NDX that can be entered into a staking position.

NOTE: this parameter can be changed via governance after launch, subject to an on-chain vote.

The options are:

1. 50 NDX
2. 100 NDX
3. Reject above options

If any of the [dNDX Parameters] votes are won by 'Reject above options', deployment of the dNDX functionality will be paused and a new forum thread opened to discuss alternative options.