Various updates for v53 buildings/items

[NicksWorld]

The following is accomplished:

• Blueprints can now include reinforced walls and bolt throwers
• Item value calculation for bolt thrower parts is corrected
• autolabor job labors now correctly treat the new dye and siege related labors as busy, instead of other

The strings I decided on for the blueprints are as follows:
CW for reinforced walls as it is a variant of wall Cw, and Cr is taken for ramps.
it for bolt thrower, as i is the common prefix for siege engines, and ib is taken for ballistas.

Fixes #5635