10x Exponentially scaling all-packs infinite research to increase space landing pad unloader radius

[hsseraph]

In the FFF 443 including unloaders, it was noted that the current radius is a flat 59 tiles.

This proposal to add an infinite research to increase it isn't based in the ability to make it arbitrarily larger (as that would eventually allow for instantaneous transfer of items over arbitrary distances), but to serve as an eSPM benchmark for megabasers by being a 60 second research using all packs simultaneously, which doesn't itself alter the eSPM value on completion the way that research productivity does.

With this in mind, each unit of research could be configured to increase the radius by a flat number, but for the requirements to start high, and for each level have its science requirement increase by 10x or some other substantial number, meaning that in practice only a small number of levels can reasonably be achieved, avoiding the instantaneous item transport problem.

Sample values:

Reduce the base radius to 39 tiles, each level increases the radius by 5, the baseline is 10000 science

10k -> 44
100k -> 49
1mil -> 54
10mil -> 59
100mil -> 64
1bil -> 69
10bil -> 74

which, while the research can continue, would be the practical upper limit for even the most determined megabasers, this would not break the balance to an overwhelming degree.