Add option to indicate an stating date for transfersWithTimestamp

[llunaCreixent]

This could be added to other commands in case they include a date.
What needs to be added in the query: time_gt: ${date}, in the where clause of the subgraph query (https://github.com/CirclesUBI/circles-analysis/blob/main/lib.js#L61). In this subgraph query date is a timestamp in seconds, which can be calculated like Math.floor(new Date("2023-08-01").getTime() / 1000);