Make pascal engine link to hwengine-future and use WFC generator

Merge default

Add corrosion as a subdirectory, CMake fixes

Store all snowflakes in a separate array, achieving performance increase of about 10% for the whole engine on winter maps

Avoid creating unused string that is quite costly to produce

Improve pas2c rtl performance by avoiding double iteration on strings

Implement triggering advancement of simulation in qmlfrontend

Implement key bindings