Add fire lookout tower basecamp

[krulunio]

Summary

Content "Add fire lookout tower basecamp"

Purpose of change

I'm working on more basecamp types, here's fire lookout tower basecamp (1 variant).

Describe the solution

Add simple upgrade path: 8 shacks, water well, root cellar, radio tower, palisade segments and entrance doors; basecamp starts with kitchen_recipes_1 and 2 (because of kitchen on Z-level 1); can be built only on Z-level 0.

Describe alternatives you've considered

I thought about using Z-level 1, but it would block access to expansion upgrades.

Testing

I created and upgraded few camps, layout may seem claustrophobic, but everything seems to work. Here are screenshots

Additional context

On picture 10 are shown all beds, but each pair of beds is built in separated steps, not all at once.
On picture 16 is shown pair of reinforced wooden doors, but player can also choose to build metal doors.