Fleet designer

tldr:

Add an option to create ship compositions from your ship designs, i.e. a fleet template.

A fleet template can be used to produce whole fleets instead of ordering individual ships and also replenish fleets with the appropriate ships if you have taken losses.

Inspiration:

The army builder from EU4 with "The Art of War"

Requirements:

1) A menu where:

-you can allocate ship designs towards your fleet command cap, i.e. create a fleet template

-update existing fleet templates (e.g. when you increased the fleet command cap)

-set preferences* for fleet production (how many systems contribute to fleet construction, should only idle systems be used etc.).

2) once a fleet is produced the ships should converge on the system you ordered the fleet in (or better yet introduce rally points) and merge into the fleet

3) a fleet order to replace losses. instead of looking up what ships you lost, going to a nearby planet and ordering a new ship and manually flying it to the fleet, you just click the reinforce button and it will order the missing ship/ships from appropriate* systems and they automatically fly to the fleet and merge with it once they are build.

*the choice of the right systems is crucial, ideally you want a smart system that chooses systems that are nearby and have appropriate production levels and are not busy with some priority production, e.g. building a wonder. this is mostly up to the designers to get right. i will not go into further details because this will bloat the idea needlessly.