Hotfix and balance patch 23.09.29

Changelog, version 23.09.29 

UX

Entrance markers of structures are no longer shown if they are from all sides.

Balance
Halved the cost of all structure maintenance.
Rebalanced requirements and costs of several technologies.
Added more resources to the starting ship; increased its storage capacity by 500.
Labs no longer get research penalty if they have schooling enabled, but have no students.
Packaged food for shuttle missions can be taken even from canteens if it's not available from storage.

Fixes
Crash when an unassigned student died.
Rare crash regarding movement.
Several crashes regarding pregnancy.
Crash when exploration was set to be done in order, but no sectors were queued (this time for real :))
Clinic Education Unit had no space for students.
Recipe for surveyor in Vehicle Unit had doubled time and resources.
Objectives involving population number were not working.
Requirements for technologies were checked too early, resulting in some not registering even though they should. For example agronomies not being available immediately after a Greenhouse was built.